For

The FOR clause allows you to specify table locking behavior during a SELECT statement. It's commonly used to control concurrent access to data in multi-user database environments.

The Yiisoft\Db\Query\Query class provides three methods to specify the FOR fragment of a SQL query:

• for() - sets the FOR part of the query;
• addFor() - adds more FOR parts to the existing ones;
• setFor() - overwrites the FOR part of the query.