SQL statements are generated by OpenTunnel Designer each time you use certain database tools and key-ins. For example, OpenTunnel Designer generates a SQL INSERT statement when you use the Attach Active Entity tool with Linkage Mode set to New.

By default, OpenTunnel Designer immediately commits SQL statements to the database software. In an alternate mode, OpenTunnel Designer commits statements only when your input necessitates the addition of a row to a database table. The process of adding rows requires the database software to lock tables, and commitment is required to release those locks. The alternate mode can be useful when it is desirable to be able to undo uncommitted SQL statements.