Setting Check Name and Expression

Use the Name edit box to set the check name.

Check
Set the condition for checking, e.g. "field_name1 > 0 AND field_name2 > field_name1" in the Check edit box. A check constraint specified as a column constraint should reference that column's value only, while an expression appearing in a table constraint may reference multiple columns.

Definition
Type in the definition for the check constraint.

Enable
You can choose whether to enable / disable the check constraint by checking / unchecking the box.