![]() Let us create a table called Names that we want to rename. sqlite> CREATE TABLE Names(Id INTEGER, Name TEXT) It is not possible to rename a column, removeĪ column, or add or remove constraints from a table. This statement in SQLite allows a user to rename a table or to add a newĬolumn to an existing table. SQLite supports a limited subset of the ALTER TABLE statement. This SQL statement deletes the Cars table from the test2ĭatabase. This statement will drop the Testing table only if it exists. IF EXISTS clause we can avoid this error. Trying to drop a table that does not exist leads to an error. The DROP TABLE statement removes the Testing tableįrom the database. The DROP statement is used to delete a table from a database.īooks Cars2 Friends Reservations test2.Cars A temporaryĭatabase is destroyed each time the database connection is closed. With the TEMPORARY keyword, we create a temporary database. Sqlite> SELECT * FROM temp.Cars WHERE Id=1 Sqlite> INSERT INTO temp.Cars VALUES (1, 'Kia', 24300) Advertisements sqlite> CREATE TEMPORARY TABLE Cars(Id INTEGER PRIMARY KEY, Name TEXT, Price INTEGER) In this case, if the database name is not specified, the main Want to create a table in the test2 database. Since we have two databases it is mandatory to specify the database name if we Sqlite> SELECT * FROM test2.Cars WHERE Id=1 Sqlite> SELECT * FROM main.Cars WHERE Id=1 Sqlite> INSERT INTO test2.Cars VALUES(1, 'Porsche', 107699) sqlite> CREATE TABLE test2.Cars(Id INTEGER PRIMARY KEY, Name TEXT, Price INTEGER) The first database is called main and the new database is called We add a new database to the current database connection with the ATTACH DATABASE ![]() sqlite> ATTACH DATABASE 'test2.db' AS test2 The above statement creates an identical table to the Cars ![]() sqlite> CREATE TABLE Cars2 AS SELECT * FROM Cars AS statement enables toĬreate a new table based on a SELECT statement. We get no error message for trying to create a table that already exists. sqlite> CREATE TABLE IF NOT EXISTS Testing(Id INTEGER) With this clause nothing is done and we receive no error. The CREATE TABLE statement has an optional IF NOT EXISTSĬlause. If we try to create a table that already exists, we get an error. sqlite> CREATE TABLE Testing(Id INTEGER) schema command shows the formal definition of the table. We create a simple Testing table with the CREATE TABLE
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