Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

CHECK constraint <name> already exists. (Error 3756)

This error occurs when, using the ALTER TABLE ALTER COLUMN syntax, you try to use a constraint name for a CHECK constraint that is already used on that table. This error can also occur when using the Microsoft Office 12.0 Access Database Engine OLE DB Provider and attempting to add a CHECK constraint that has the same name as another CHECK constraint in the same table.

Community Additions

© 2015 Microsoft