Sqlite update column name before insert how to#
Sqlite update column name before insert code#

If you query the Locations table, you will see that the column Address has been renamed to Street: SELECT * FROM Locations Code language: SQL (Structured Query Language) ( sql ) RENAME TO Locations Code language: SQL (Structured Query Language) ( sql )įinally, commit the transaction: COMMIT Code language: SQL (Structured Query Language) ( sql ) Third, copy data from the table Locations to LocationsTemp: INSERT INTO LocationsTemp(Street,City,State,Country)įROM Locations Code language: SQL (Structured Query Language) ( sql )įourth, drop the Locations table: DROP TABLE Locations Code language: SQL (Structured Query Language) ( sql )įifth, rename the table LocationsTemp to Locations: ALTER TABLE LocationsTemp Second, create a new table called LocationsTemp with the same structure as the Locations table except for the Address column: CREATE TABLE LocationsTemp(Ĭode language: SQL (Structured Query Language) ( sql ) Suppose that you want to the change the column Address to Street.įirst, start a new transaction: BEGIN TRANSACTION Code language: SQL (Structured Query Language) ( sql ) The following statement recreates the Locations table: DROP TABLE IF EXISTS Locations Īnd this INSERT statement inserts a new row into the Locations table: INSERT INTO Locations(Address,City,State,Country)

Fifth, rename the new table to the original table.Third, copy data from the original table to the new table.Second, create a new table whose structure is the same as the original one except for the column that you want to rename.If you’re using the SQLite with the version lower than 3.25.0 and could not upgrade, then you should follow these steps to rename a column: SQLite did not support the ALTER TABLE RENAME COLUMN syntax before version 3.25.0. ) Code language: SQL (Structured Query Language) ( sql ) The old way to rename column schema Locations Code language: Shell Session ( shell ) Output: LocationId Street City State Countryġ 3960 North 1st Street San Jose CA USA Code language: Shell Session ( shell )įinally, show the schema of the Locations table. RENAME COLUMN Address TO Street Code language: SQL (Structured Query Language) ( sql )įourth, query data from the Locations table: SELECT * FROM Locations Code language: SQL (Structured Query Language) ( sql ) Third, rename the column Address to Street by using the ALTER TABLE RENAME COLUMN statement: ALTER TABLE Locations VALUES( '3960 North 1st Street', 'San Jose', 'CA', 'USA') Code language: SQL (Structured Query Language) ( sql ) Second, insert a new row into the Locations table by using the INSERT statement: INSERT INTO Locations(Address,City,State,Country) ) Code language: SQL (Structured Query Language) ( sql ) Let’s take an example of using the ALTER TABLE RENAME COLUMN statement.įirst, create a new table called Locations: CREATE TABLE Locations( Second, specify the name of the column that you want to rename after the RENAME COLUMN keywords and the new name after the TO keyword.First, specify the name of the table after the ALTER TABLE keywords.

RENAME COLUMN current_name TO new_name Code language: SQL (Structured Query Language) ( sql ) SQLite added support for renaming column since version 3.25.0 using the ALTER TABLE statement with the following syntax: ALTER TABLE table_name Introduction to SQLite ALTER TABLE RENAME COLUMN statement

Sqlite update column name before insert how to#

Updates = input('Enter the updated data: ')Ĭ.Summary: in this tutorial, you will learn step by step how to rename a column of a table in SQLite. Here's the code now that works: def update_func(column_choice): I was searching more for the answer and I found this stack overflow answer that worked. I've searched a lot but have only found answers about how to set a variable to the value, not the column name. This doesn’t work though (with an error that reads: sqlite3.OperationalError: near '?': syntax error). # ‘username’ is the name of the column in db # edit_doc_num stores the number of the PK of the record that is being edited but is not relevant for this problem Updates = input('Enter the updated data: “)Ĭ.execute('UPDATE docs SET (?)=(?) WHERE doc_id=(?)', I was thinking of doing it like this and have ‘(?)’ as the placeholder for the column name def update_func(column_choice): But my problem is the SQLite command will change depending on the menu input and I’m not sure how to put a variable in an SQLite command where the column name is unknown, not the value. There is a lot of similar code so I want to create a function that I call that will get the updated data and execute the change to the database. I have a menu that displays which columns the user can edit (username, forename, surname, email) and based on the user input, it will prompt the user to enter the updated data and it will commit it to the database. I am using SQLite in Python and I am creating a very basic knowledge base system and I want the user to have the option to edit records.