Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

In this example, Transact-SQL will create a new table with all columns from the rows in "old_table" in which the last name starts with "Ja." ...

The first form of the CREATE TABLE statement creates tables that automatically map SQL data types to those supported by the SAS System. Use this form when you want to create a new table with columns ...

How to Reindex SQL Tables. The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can ...