Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

Any column that is not modified retains its original values, except in certain queries using the CASE expression. See CASE expression for a description of CASE expressions. To add, drop, or modify a ...

Using MS SQL Server, is there a way to query all of the tables in a database for a specific column name?Thanks,Pete ...

Therefore, special consideration should be used when the names of DBMS objects, such as tables and columns, are used with SAS/ACCESS and the SQL Procedure Pass-Through Facility. See your DBMS chapter ...