DB2创建VIEW的时候CHECK OPTION的作用
创建视图的时候有几种CHECK OPTION

------------------------------ Commands Entered ------------------------------INSERT INTO v3L VALUES (50);INSERT INTO v3C VALUES (50);------------------------------------------DB20000I  The SQL command completed successfully.DB20000I  The SQL command completed successfully.------------------------------ Commands Entered ------------------------------INSERT INTO v3L VALUES (100);INSERT INTO v3C VALUES (100);------------------------------------------DB20000I  The SQL command completed successfully.DB20000I  The SQL command completed successfully.

CASCADED CHECK OPTION 的作用是让当前创建的视图继承它使用到的视图的过滤条件，其他就没有什么区别了，都是为了阻止INSERT和UPDATE不符合过滤条件的数据。