Here's what the table structure looks like: 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." ...

CREATE TABLE SalesHistory (SaleID int IDENTITY(1,1) NOT NULL, ProductID TINYINT, CustomerID INT, ... You can use cascading constraints in SQL Server to set related values to NULL, ...

This program segment deletes integrity constraints using PROC SQL. proc sql; alter table salary DROP CONSTRAINT for_key; alter table people DROP CONSTRAINT gender DROP CONSTRAINT _nm0001_ DROP ...

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 ...

If your business uses relational databases to store data, it helps to use the SQL SELECT command with the INTO clause to create new tables from query results. This method isn't ANSI-standard SQL ...

SQL lets you use one command to quickly create a new table containing a subset of records from a larger table while working in Access. Sound complicated? It's not, as Mary Ann Richardson shows us.