![]() ![]() ![]() I only have less than 2,000 Records / 11 Columns (including the Unique ID). ![]() This seems to me the simple and fast solution. The more I think at this problem to be solved, the more I think the solution is to create a brand new Table with the Columns I need, then drop the previous one (or better: create a brand new file). 1 To drop a column in an SQLite database Django follows the procedure described here: Which in simple words is create a new table, copy data from old table, delete old table and then rename new table. The question is How do I edit the sql_master Table ? RecordSet, search the Record that holds the Column to change its name, do it just like any RecordSet, If it is possible to rename the now useless Column name (in sql_master), I can change my current code (only add two new Columns and give a new name to the useless COlumn fo fit my needs). Since now, because it tooks me time to add Columns to the Table, I do not wanted to rename the old table create a new one and populate it with the old contents / delete the “old Tables”. In my code, I use the Column Names to access their contents, so from the data base point of view, the order of appearance of the Columns is not a problem for me. I never think I can modify the sql_master contents ! It is not possible to rename a column, remove a column, or add or remove constraints from a table. ![]() The DROP COLUMN command only works if the column is not referenced by any other parts of the schema and is not a PRIMARY KEY and does not have a UNIQUE constraint. The ALTER TABLE command in SQLite allows the user to rename a table or add a new column to an existing table. The DROP COLUMN command removes the named column from the table, and rewrites its content to purge the data associated with that column. I just fired it and I can see my three added Columns at the end of the previous columns. Dropping Constraint SQLite supports a limited subset of ALTER TABLE. I build an utility that allow me to load all defined table including sql_master and report their contents. There is also a way to combine steps 2 and 3 into a single SQL command that creates the table and populates its data in a single step.For renaming only columns, you can edit the sqlmaster table. But you can also send the commands from Xojo by using the Database.SQLExecute method. Typically you will run the above commands using your favorite SQL tool. In this case you would create the new table without the column you want to delete and then don't copy that column's data over to it. You can also use the above steps to remove a column from a table as SQLite has no ability to do that. Many sqlite tools do this for you behind the scenes, but in Xojo you have to do all the work yourself. You have to create a copy of the table (along with its data), drop the original table, recreate the original without the column, and copy the data back (minus the column you’re dropping). Keep in mind that you will also need to recreate any indexes, viewers or triggers on the new table as well. SqLite does not support dropping a column. With these four steps you can manually change any SQLite table. Drop the original table with this SQL: DROP TABLE team_orig.Copy the data from the original table to the new table with this SQL: INSERT INTO team(Name, Coach, Location) SELECT Name, Coach, City FROM team_orig.Create the replacement table with the original name and corrected column name with this SQL: CREATE TABLE team(Name TEXT, Coach TEXT, Location TEXT).11100 Closed anothermindbomb opened this issue on 4 comments anothermindbomb commented on Windows 10 Dbeaver 7.3. Issue 11100 dbeaver/dbeaver GitHub dbeaver Notifications Fork 2.9k Star New issue sqlite3 - deleting a column does not delete the column. Rename the original table with this SQL: ALTER TABLE team RENAME TO team_orig sqlite3 - deleting a column does not delete the column.You later realize that the City column ought to instead be called Location. The workaround is to create a new table with the columns named the way you want and then copy the data from the old table to the new table.įor example, suppose you created a table with this SQL:ĬREATE TABLE team(Name TEXT, Coach TEXT, City TEXT) In earlier versions of SQLite, the ALTER TABLE command cannot be used to rename an existing column on a table. If you need to delete a column you will want to use the technique described below. Dim sql As String = "ALTER TABLE Team RENAME COLUMN Coach To HeadCoach " ![]()
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