But in Python 3, cursor.mogrify() returns bytes, cursor.execute() takes either bytes or strings, and ','.join() expects str instance. Perform Inserting multiple rows in a single PostgreSQL query data import, export, replication, and synchronization easily. It took about 10 seconds when using this method: New execute_values method in Psycopg 2.7: The pythonic way of doing it in Psycopg 2.6: Explanation: If the data to be inserted is given as a list of tuples like in, then it is already in the exact required format as, the values syntax of the insert clause expects a list of records as in, insert into t (a, b) values (1, 'x'),(2, 'y'). Indeed, executemany() just runs many individual INSERT statements. We can python - query - psycopg2 insert dictionary psycopg2: insert multiple rows with one query (9) cursor.copy_from is the fastest solution I've found for bulk inserts by far. If you have many (1000+) rows to insert, I strongly advise to use any one of the bulk insert methods benchmarked here. def insert_multiple_row(self, insert_sql, row_tuple): @ant32 ‘s code works perfectly in Python 2. Pass the SELECT * FROM SQL string to the sql.SQL() method call to have it return a psycopg2.sql.SQL object, and use Python’s format() function to insert the table name into the string. Python super noob here. The count is the number of rows that the INSERT statement inserted successfully. Here's a gist I made containing a class named IteratorFile which allows an iterator yielding strings to be read like a file. pgCursor = Conn. cursor (cursor_factory = psycopg2. This is what PostgreSQL's RETURNING extension is designed for, and it seems to work fine using cursor.execute: cursor.execute( "INSERT INTO my_table (field_1, field_2) " "VALUES (0, 0), (0, 0) RETURNING id;" ) print cursor.fetchall() [ (1,), (2,)] Questions: During a presentation yesterday I had a colleague run one of my scripts on a fresh installation of Python 3.8.1. Using Mysql in the command line in osx – command not found? Update 2017: psycopg2 now has fast execution helpers. The most famous library to connect PostgreSQL from Python might be psycopg2. If you had the following: You could easily insert all three rows within the dictionary by using: It doesn’t save much code, but it definitively looks better. host all postgres 109.197.197.197/32 md5 Slash /32 is meaning that single IP will be … I have a file of primary keys, one per line. I'm wondering what the most efficient way would be to delete large numbers of rows from PostgreSQL, this process would be part of a recurring task every day to bulk import data (a delta of insertions + deletions) into a table. Indeed, executemany() just runs many individual INSERT statements. Not sure why they didn't just improve executemany. The first parameter of this method is a parameterized SQL statement. Python psycopg2 last inserted row id. Here’s some example code that will do that and select all of the data rows from a PostgreSQL table: The Psycopg module and the connection objects are thread-safe: many threads can access the same database either using separate sessions and creating a connection per thread or using the same connection and creating separate cursor s. In DB API 2.0 parlance, Psycopg is level 2 thread safe. The classic executemany() is about 60 times slower than @ant32 ‘s implementation (called “folded”) as explained in this thread: https://www.postgresql.org/message-id/20170130215151.GA7081%40deb76.aryehleib.com. It will also be more memory efficient than building a giant query string. How to INSERT INTO with psycopg2 04 Jun 2016. RETURNING clause. In this syntax: First, specify the name of the table that you want to add a new column to after the ALTER TABLE keyword. To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). To insert a row into a PostgreSQL table in Python, you use the following steps: First, connect to the PostgreSQL database server by calling the connect () function of the psycopg module. javascript – window.addEventListener causes browser slowdowns – Firefox only. Write a SQL statement to insert a record with your own value into the table countries against each column. conn = psycopg2.connect (dsn) The connect () function returns a new instance of the connection class. The psycopg2 does not support the lastrowid attribute. Psycopg adapts a Python tuple to a Postgresql record. When you run above code successfully, you can see the inserted row in pgAdmin3. However I don't expect it to be super-slow either.… command line connect csv dataframe insert linux pandas postgresql Psycopg2 python3 SQL For me, i have multiple rows that i would like to return back into a dictionary and ideally dont want to use a loop or similar to set the key from a field in the database.. A cursor that uses a real dict as the base type for rows. If you’re using SQLAlchemy, you don’t need to mess with hand-crafting the string because SQLAlchemy supports generating a multi-row VALUES clause for a single INSERT statement: I’ve been using ant32’s answer above for several years. I'm using a Postgres server in AWS in the us-east zone. 2.2 Insert Multiple Rows To Postgresql Table. Save my name, email, and website in this browser for the next time I comment. Note that this cursor is extremely specialized and does not allow the normal access (using integer indices) to fetched data. Learning by Sharing Swift Programing and more …. There could be thousands, potentially millions of rows to delete. This is my first python script that deals with a database. Python psycopg2 last inserted row id. The execute() method accepts two parameters. It is array, which may contain any amount of objects inside. For this trivial size of args it won’t make much of a speed difference, but I see big speedups when dealing with thousands+ of rows. Why. We can python - query - psycopg2 insert dictionary psycopg2: insert multiple rows with one query (9) cursor.copy_from is the fastest solution I've found for bulk inserts by far. cursor.copy_from is the fastest solution I’ve found for bulk inserts by far. I do not expect this to be fast. Whether you are a data analyst, data scientist, data engineer, or even a web developer, it is important to know ho… But in Python 3, cursor.mogrify() returns bytes, cursor.execute() takes either bytes or strings, and ','.join() expects str instance. The INSERT statement also has an optional RETURNING clause that returns the information of the inserted row. The second parameter is the data, in the form of a tuple of tuples. This implementation was added to psycopg2 in version 2.7 and is called execute_values(): To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). However, I am wondering if there is a way to do inserts with out having to open and close a postgres connection each time an insert is done. It allows to: create new cursor instances using the cursor() method to execute database commands and queries,; terminate transactions using the methods commit() or rollback(). If you want to insert multiple rows within one insert statemens (assuming you are not using ORM) the easiest way so far for me would be to use list of dictionaries. psycopg2 is a simple and easy library for the people who want to manipulate SQL simply.The usage is basically pretty straightforward but I got stuck when I tried to a record into PostgreSQL via psycogpg2. Python super noob here. Here’s some code which doesnt use cur.mogrify and is nice and simply to get your head around: But it should be noted that if you can use copy_from(), you should use copy_from 😉. The count is the number of rows that the INSERT statement inserted successfully.. ... query with multiple rows to insert. To insert multiple rows in the table use executemany() method of cursor object.. Syntax: cursor_object.executemany(statement, arguments) statement: string containing the query to execute.. arguments: a sequence containing values to use within insert statement.. Let's take an example. How to INSERT INTO with psycopg2 04 Jun 2016. I'm using a Postgres server in AWS in the us-east zone. I do not expect this to be fast. javascript – How to get relative image coordinate of this div? We can convert each input record to a string using a generator expression. However, I am wondering if there is a way to do inserts with out having to open and close a postgres connection each time an insert is done. psycopg2 connection cursor’s executemany method can execute insert sql command to insert a list of rows into postgresql table. ; Second, specify the name of the new column as well as its data type and constraint after the ADD COLUMN keywords. I found out that using this method was about 10 times faster than executemany.In my case tup is a tuple containing about 2000 rows. The main entry points of Psycopg are: The function connect() creates a new database session and returns a new connection instance. I found out that using this method was about 10 times faster than executemany. You will find hundreds of SQL tutorials online detailing how to write insane SQL analysis queries, how to run complex machine learning algorithms on petabytes of training data, and how to build statistical models on thousands of rows in a database. Here’s a gist I made containing a class named IteratorFile which allows an iterator yielding strings to be read like a file. Psycopg adapts a Python tuple to a Postgresql record. from psycopg2.extras import execute_values execute_values(cur, "INSERT INTO test (id, v1, v2) VALUES %s", [(1, 2, 3), (4, 5, 6), (7, 8, 9)]) [Previous Answer] To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). If you had the following: You could easily insert all three rows within the dictionary by using: It doesn’t save much code, but it definitively looks better. However I don't expect it to be super-slow either.… How can I check if a string contains letters in Swift? An iterator would only ever hold one input record in memory at a time, where at some point you’ll run out of memory in your Python process or in Postgres by building the query string. Update 2017: psycopg2 now has fast execution helpers. It will also be more memory efficient than building a giant query string. Generate temporary file names without creating actual file in Python, Check whether a file exists without exceptions, Merge two dictionaries in a single expression in Python. The second parameter is the data, in the form of a tuple of tuples. It took about 10 seconds when using this method: New execute_values method in Psycopg 2.7: The pythonic way of doing it in Psycopg 2.6: Explanation: If the data to be inserted is given as a list of tuples like in, then it is already in the exact required format as, the values syntax of the insert clause expects a list of records as in, insert into t (a, b) values (1, 'x'),(2, 'y'). I built a program that inserts multiple lines to a server that was located in another city. https://www.postgresql.org/message-id/20170130215151.GA7081%40deb76.aryehleib.com. This reduces the number of round trips to the database server drastically, and results in much faster performance. Leave a comment. We insert eight rows into the table using the convenience executemany() method. After one or more rows are added using INSERT statement, the rows of the PostgreSQL table can be queried using the SELECT statement. But in Python 3, In this syntax, instead of using a single list of values, you use multiple comma-separated lists of values for insertion. Here’s an example of an insert query on the users table: INSERT INTO users VALUES (10, "[email protected]", "Some Name", "123 Fake St.") Using the INSERT command, we can insert … The psycopg2 does not support the lastrowid attribute. OID is an object identifier. Also you don't need to escape any value, psycopg2 will do the escaping for you. Here is an example: As you can see only one query will be executed: February 20, 2020 Python Leave a comment. However I’ve found that is thorws an error in python 3 because mogrify returns a byte string. So in Python 3 you may need to modify @ant32 ‘s code, by adding .decode('utf-8'): Or by using bytes (with b'' or b"") only: cursor.copy_from is the fastest solution I’ve found for bulk inserts by far. psycopg2 connection cursor’s executemany method can execute insert sql command to insert a list of rows into postgresql table. @ant32 ‘s code works perfectly in Python 2. Each time you use execute, psycopg2 does a complete return trip from the database to your computer, so this means it will execute the row INSERT to the database server, and then return. Indeed, executemany() just runs many individual INSERT statements. remote connection just for single IP (if multiple add multiple lines). Is there a better way to iterate over two lists, getting one element from each list for each iteration? In my case tup is a tuple containing about 2000 rows. © 2014 - All Rights Reserved - Powered by, psycopg2: insert multiple rows with one query. I need to insert multiple rows with one query (number of rows is not constant), so I need to execute query like this one: I built a program that inserts multiple lines to a server that was located in another city. Inserting rows into a PostgreSQL table using Python: Psycopg2 is the Python client for the PostgreSQL Relational Database Management System. The insert command requires a table name to insert to and the sequence of values to insert. @ant32 ‘s code works perfectly in Python 2. The only problem is: no one mentions how you get the data stored in the first place. The second parameter is a list of input values that you want to pass to the UPDATE statement.. The number of rows that you can insert at a time is 1,000 rows using this form of the INSERT statement. A snippet from Psycopg2’s tutorial page at Postgresql.org (see bottom): A last item I would like to show you is how to insert multiple rows using a dictionary. ; The class connection encapsulates a database session. Here’s a gist I made containing a class named IteratorFile which allows an iterator yielding strings to be read like a file. It took about 10 seconds when using this method: 4. If you need to access database rows both as a dictionary and a list, then use the generic DictCursor instead of RealDictCursor. Instead of inserting a single row query, the refactored version creates a query with multiple rows to insert. My goal is to perform a 2D histogram on it. For this trivial size of args it won’t make much of a speed difference, but I see big speedups when dealing with thousands+ of rows. Rows: Another array of text Notice that we did not use row[1] but instead used row['notes'] which signifies the notes column within the bar table. We can convert each input record to a string using a generator expression. The first parameter is an SQL statement to be executed, in this case, it is the UPDATE statement. Typically, the INSERT statement returns OID with value 0. The first parameter of this method is a parameterized SQL statement. ; When you add a new column to the table, PostgreSQL appends it at the end of the table. The INSERT statement also has an optional RETURNING clause that returns the information of the inserted row. A last item I would like to show you is how to insert multiple rows using a dictionary. In my case tup is a tuple containing about 2000 rows. If you want to insert more rows than that, you should consider using multiple INSERT statements, BULK INSERT or a derived table. A last item I would like to show you is how to insert multiple rows using a dictionary. RETURNING clause. PostgreSQL Insert Rows into the Table [13 exercises with solution] 1. An iterator would only ever hold one input record in memory at a time, where at some point you’ll run out of memory in your Python process or in Postgres by building the query string. Skyvia is a cloud service for Inserting multiple rows in a single PostgreSQL query integration & backup. rows = cur.fetchall() for row in rows: print " ", row['notes'][1] The above would output the following. Then your SQL looks like: Notice: Your postgress must be new enough, to support json. In relational databases, the term upsert is referred to as merge. Typically, the INSERT statement returns OID with value 0. @ant32 ‘s code works perfectly in Python 2. This reduces the number of round trips to the database server drastically, and results in much faster performance. So the solution would be. I need to insert multiple rows with one query (number of rows is not constant), so I need to execute query like this one: I built a program that inserts multiple lines to a server that was located in another city. I found out that using this method was about 10 times faster than executemany.In my case tup is a tuple containing about 2000 rows. My database client is running in California, so it's about 150ms away. This solution is based on J.J solution but has a different IF/Else structure, due to running into problems. https://www.postgresql.org/message-id/20170130215151.GA7081%40deb76.aryehleib.com, python – Understanding numpy 2D histogram – Stack Overflow, language lawyer – Are Python PEPs implemented as proposed/amended or is there wiggle room? Here's a gist I made containing a class named IteratorFile which allows an iterator yielding strings to be read like a file. A snippet from Psycopg2’s tutorial page at Postgresql.org (see bottom): A last item I would like to show you is how to insert multiple rows using a dictionary. Not sure why they didn't just improve executemany. This implementation was added to psycopg2 in version 2.7 and is called execute_values(): To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). Questions: I have the following 2D distribution of points. a check fails)? We insert eight rows into the table using the convenience executemany() method. psycopg2 is a simple and easy library for the people who want to manipulate SQL simply.The usage is basically pretty straightforward but I got stuck when I tried to a record into PostgreSQL via psycogpg2. extras. Rows: Another array of text Notice that we did not use row[1] but instead used row['notes'] which signifies the notes column within the bar table. If you need to access database rows both as a dictionary and a list, then use the generic DictCursor instead of RealDictCursor. So using dict comprehension syntax i can do the following. My database client is running in California, so it's about 150ms away. I found out that using this method was about 10 times faster than executemany. Posted by: admin I built a program that inserts multiple lines to a server that was located in another city. Required fields are marked *. rows = cur.fetchall() for row in rows: print " ", row['notes'][1] The above would output the following. The only necessary work is to provide a records list template to be filled by psycopg, Now to the usual Psycopg arguments substitution, Or just testing what will be sent to the server, The classic executemany() is about 60 times slower than @ant32 ‘s implementation (called “folded”) as explained in this thread: https://www.postgresql.org/message-id/20170130215151.GA7081%40deb76.aryehleib.com. The most famous library to connect PostgreSQL from Python might be psycopg2. The executemany first argument is the sql statement, the second argument is a list or tuple of row values. Another nice and efficient approach – is to pass rows for insertion as 1 argument, which is array of json objects. Single inserts scale very very poorly as the number of rows increase. So in Python 3 you may need to modify @ant32 ‘s code, by adding .decode('utf-8'): Or by using bytes (with b'' or b"") only: All of these techniques are called ‘Extended Inserts” in Postgres terminology, and as of the 24th of November 2016, it’s still a ton faster than psychopg2’s executemany() and all the other methods listed in this thread (which i tried before coming to this answer). It took about 10 seconds when using this method: So the solution would be. A cursor that uses a real dict as the base type for rows. What is the best way to exit a function (which has no return value) in python before the function ends (e.g. November 14, 2017 Using custom font for entire iOS app swift. Indeed, executemany() just runs many individual INSERT statements. Converting explicitly to bytse strings is a simple solution for making code python 3 compatible. Notice that the preceding code did not use row[1] but instead used row['notes'], which signifies the notes column within the bar table. Add insert_multiple_row method in PostgresqlManager.py. jquery – Scroll child div edge to parent div edge, javascript – Problem in getting a return value from an ajax script, Combining two form values in a loop using jquery, jquery – Get id of element in Isotope filtered items, javascript – How can I get the background image URL in Jquery and then replace the non URL parts of the string, jquery – Angular 8 click is working as javascript onload function. Table Rows Into Dictionary. – Stack Overflow, python – os.listdir() returns nothing, not even an empty list – Stack Overflow. Data storage is one of (if not) themost integral parts of a data system. To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). This is my first python script that deals with a database. Your email address will not be published. The output from that is identical to the example that used the column number: Rows: Another array of text Finally, I'd like to show you how simple it is to insert multiple rows using a dictionary. PostgreSQL used the OID internally as a primary key for its system tables. Use the psycopg2 ‘sql’ module to format a SQL statement. The only necessary work is to provide a records list template to be filled by psycopg, Now to the usual Psycopg arguments substitution, Or just testing what will be sent to the server. In this particular case is also suggested to not pass the table name in a variable ( escaped_name ) but to embed it in the query string: psycopg2 doesn't know how to quote table and column names, only values. Summary: in this tutorial, you will learn how to use PostgreSQL upsert feature to insert or update data if the row that is being inserted already exists in the table.. Introduction to the PostgreSQL upsert. Here in the following is the structure of the table countries. I'd like to use psycopg2 to INSERT multiple rows and then return all the id s (in order) using a single query. Not sure why they did n't just improve executemany this cursor is specialized... The update statement extremely specialized and does not allow the normal access ( using integer indices ) fetched. And does not allow the normal access ( using integer indices ) psycopg2 insert multiple rows data!, 2020 Python Leave a comment we can convert each input record to a that... One mentions how you get the data stored in the us-east zone generic... A class named IteratorFile which allows an iterator yielding strings to be super-slow either.… Python noob. So it 's about 150ms away fast execution helpers here in the form of a data.. Add column keywords, and results in much faster performance insert eight rows into the table, PostgreSQL it! Method is a tuple of tuples, instead of using a Postgres server in in! Fast execution helpers 's about 150ms away this browser for the next time I comment ) Python. – os.listdir ( ) just runs many individual insert statements by, psycopg2: insert multiple rows this. Runs many individual insert statements OID internally as a dictionary array, which is array which. Has a different IF/Else structure, due to running into problems query integration &.! Client for the next time I comment Python client for the next time I.. Different IF/Else structure, due to running into problems about 10 times than... Perfectly in Python before the function ends ( e.g your own value into the table, PostgreSQL it. A program that inserts multiple lines to a string contains letters in Swift: no one how!, in the form of a data system colleague run one of my scripts on fresh. Do n't expect it to be read like a file and does not the... Value ) in Python 2 coordinate of this method was about 10 times faster than executemany.In case. Than building a giant query string count is the number of rows into PostgreSQL table insert. The update statement Overflow, Python – os.listdir ( ) method the add column keywords in Python.! You add a new instance of the connection class keys, one per line: admin November,!, email, and website in this syntax, instead of RealDictCursor what is the data stored in form... Per line for single IP ( if multiple add multiple lines ) my Python... Super-Slow either.… Python super noob here list of rows increase Python tuple to a record... Which allows an iterator yielding strings to be read like a file of primary,. Round trips to the database server drastically, and website in this syntax, instead of RealDictCursor to table! Not sure why they did n't just improve executemany for BULK inserts by far (. Running in California, so it 's about 150ms away rows that you can at. Command not found ) is about 10x faster than using psycopg2 executemany ). Is referred to as merge – os.listdir ( ) method for the next time I comment insert! Access ( using integer indices ) to fetched data like a file February... S a gist I made containing a class named IteratorFile which allows an yielding... A colleague run one of ( if multiple add multiple lines ) dsn the... Deals with a database 150ms away format a SQL statement insert a record with your own value into table... Real dict as the base type for rows I comment end of the column. Just improve executemany scale very very poorly as the base type for rows OID as. Of json objects expect it to be read like a file rows, using the multirow values syntax with (. Or tuple of row values returns nothing, not even an empty list Stack... Inserted successfully single inserts scale very very poorly as the base type for rows integration & backup only is! Added using insert statement sure why they did n't just improve executemany of values, use... Must be new enough, to support json: During a presentation yesterday I a! Values, you use multiple comma-separated lists of values to insert multiple rows one..., potentially millions of rows into PostgreSQL table file of primary keys, one line. Results in much faster performance perform a 2D histogram on it a parameterized SQL.... Script that deals with a database program that inserts multiple lines to a PostgreSQL record multiple comma-separated lists of to... Connection just for single IP ( if psycopg2 insert multiple rows ) themost integral parts of data. ) function returns a new instance of the table using the convenience (! Be read like a file returns the psycopg2 insert multiple rows of the inserted row pgAdmin3! To format a SQL statement this reduces the number of round trips to the database server drastically and! Integral parts of a tuple of row values psycopg are: the function connect ( returns. Single PostgreSQL query integration & backup do the following 3 compatible name to insert multiple rows, using the statement... Single PostgreSQL query integration & backup constraint after the add column keywords used the internally! Perfectly fine rows increase own value into the table, PostgreSQL appends it the! Be thousands, potentially millions of rows into a PostgreSQL record Postgres server in AWS in form! Using psycopg2 executemany ( ) returns nothing, not even an empty list – Stack Overflow 2017 Leave a.. Command not found and constraint after the add column keywords code works in! Then use the psycopg2 ‘ SQL ’ module to format a SQL statement to insert multiple in. Database server drastically, and results in much faster performance in Swift the! Generic DictCursor instead psycopg2 insert multiple rows RealDictCursor execution helpers 'm using a dictionary ( ) method case tup is a parameterized statement! Iterator yielding strings to be read like a file of primary keys, one per line method was about times. A real dict as the number of rows that the insert statement returns OID with value 0 3 because returns. Sql command to insert a list of rows increase than executemany multiple comma-separated lists of values insert! Or tuple of tuples contains letters in Swift the best way to exit a function ( has... Returns nothing, not even an empty list – Stack Overflow the OID as! What is the best way to exit a function ( which has no return value ) in Python the. Rows with one query will be executed: February 20, psycopg2 insert multiple rows Leave. Skyvia is a tuple containing about 2000 rows Python script that deals with a.!: February 20, 2020 Python Leave a comment input record to server... Must be new enough, to support json command line in osx – command not?! 'S a gist I made containing a class named IteratorFile which allows an iterator yielding strings to be read a... Sql looks like: Notice: your postgress must be new enough to. With value 0 inserts by far it will also be more memory efficient than building a query! Array of json objects you run above code successfully, you use multiple comma-separated lists values! By: admin November 14, 2017 Leave a comment, 2017 Leave a comment strings is simple! Sql statement no return value ) in Python 3 because mogrify returns a new instance of table. Execute insert SQL command to insert a record with your own value into the table countries against column! Into problems PostgreSQL table using Python: psycopg2 now has fast execution helpers IP ( if multiple add lines! Simple solution for making code Python 3 compatible they did n't just improve executemany than building a giant query.!, email, and website in this case, it is the data, in the parameter.: no one mentions how you get the data stored in the of. To support json syntax I can do the following is the data stored in the first parameter is data! Postgress must be new enough, to support json faster performance syntax can. Service for Inserting multiple rows in a single PostgreSQL query data import, export, replication, and in! Want to insert multiple rows using a generator expression method can execute insert SQL psycopg2 insert multiple rows... Here ’ s a gist I made containing a class named IteratorFile which allows an iterator yielding strings be. Mysql in the us-east zone in Swift rows are added using insert statement inserted... Of objects inside and synchronization easily ve found that is thorws an error in 2... Using dict comprehension syntax I can do the following 2D distribution of points I found out that using this is! Above code successfully, you use multiple comma-separated lists of values to insert values for insertion as argument... Points of psycopg are: the function ends ( e.g connection just for single IP if! Coordinate of this method was about 10 times faster than using psycopg2 executemany ( ) is 10x. New enough, to support json a last item I would like to you. For each iteration Postgres server in AWS in the following 2D distribution of points Python to. A tuple of tuples the convenience executemany ( ) just runs many individual insert statements of a tuple about. Using Python: psycopg2 now has fast execution helpers data stored in the form of a containing. ’ module to format a SQL statement, the insert statement, the term is... Browser for the PostgreSQL Relational database Management system in Python 2 they did n't just improve executemany psycopg2 ‘ ’! Clause that returns the information of the PostgreSQL Relational database Management system to connect PostgreSQL Python!