-- Constraints can be at column level or table level. -- They are used to specify rules for the data in a table by limiting the type of data that can go into a table. A primary key is used to ensure ...

Learn how to find, modify, drop, and avoid index or constraint dependencies or changes in SQL, using system views, SQL statements, and best practices.

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is ...

What I need to do is set a constraint such that the WrenchingTool field can only contain ToolNumbers that have a corresponding ToolType of "Wrench." Meanwhile, the HammeringTool field has no such ...

I have a set of table definitions with non unique constraints on "lookup" tables with the same constraint name on a foreign key. I am able to create the tables using postgresql / testcontainers.