Check constraints are supported in all of the major DBMS products, including DB2, Oracle, and SQL Server. But they are too-often ignored and not implemented in production databases. Properly defined, ...

Example 2: Creating Integrity Constraints with the SQL Procedure. The following sample program creates integrity constraints using the SQL procedure. The data file PEOPLE lists employees and contains ...

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 ...

So, it is a good physical database design practice to implement referential integrity using database constraints. Ignoring the relationships does not eliminate the business requirement. Proper ...

In particular, this simple query shows the constraints for a given table that are foreign key constraints and which primary key constraints they depend on. displayForeignKeyConstraints.sql ...

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...

SCL provides a set of functions that enable you to work with integrity constraints (IC). Integrity constraints are a Version 7 feature of SAS software for preserving the consistency and correctness of ...