![]() Once P圜harm is connected to a database, Database tool window will display the introspected and downloaded database objects. For information on how to connect to a database, refer to the Create connection section. If no data sources are currently defined, use the New command Alt+Insert to create a data source and connect to a database. The available data sources are shown as a tree of data sources, schemas, tables and columns. You can view and modify data structures in your databases, and perform other associated tasks. Otherwise, you need to follow the steps described above to rename a column.In the Database tool window ( View | Tool Windows | Database), you can work with databases and DDL data sources. If you are using SQLite 3.25.0, you should upgrade it and use the new syntax.Use the ALTER TABLE RENAME COLUMN to rename a column in a table.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. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |