QUIT
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Rolls back the current transaction, closes the database, and ends the isql session.
QUIT;
Description: Both EXIT and QUIT close the database and end an isql session. QUIT rolls back any changes made since the last COMMIT or ROLLBACK, whereas EXIT commits the changes.
Important:
QUIT rolls back uncommitted changes without prompting for confirmation. Before using QUIT, be sure that any changes that need to be committed are committed. For example, if SET AUTODDL is off, DDL statements must be committed explicitly.