Question

I have a few tables in SQLite and I am trying to figure out how to reset the auto-incremented database field.

I read that DELETE FROM tablename should delete everything and reset the auto-incremement field back to 0, but when I do this it just deletes the data. When a new record is inserted the autoincrement picks up where it left off before the delete.

My ident field properties are as follows:

• Field Type: integer
• Field Flags: PRIMARY KEY, AUTOINCREMENT, UNIQUE

Does it matter I built the table in SQLite Maestro and I am executing the DELETE statement in SQLite Maestro as well?

Any help would be great.

Answer 1

Try this:

delete from your_table;    
delete from sqlite_sequence where name='your_table';

SQLite Autoincrement

SQLite keeps track of the largest
ROWID that a table has ever held using
the special SQLITE_SEQUENCE table. The
SQLITE_SEQUENCE table is created and
initialized automatically whenever a
normal table that contains an
AUTOINCREMENT column is created. The
content of the SQLITE_SEQUENCE table
can be modified using ordinary UPDATE,
INSERT, and DELETE statements. But
making modifications to this table
will likely perturb the AUTOINCREMENT
key generation algorithm. Make sure
you know what you are doing before you
undertake such changes.