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 most implementations of SQL, you pull information from two tables by using a SELECT command in this form: SELECT table1.column1, table1.column2, table2.column1, table2.column2 FROM table1, table2 ...

Reindexing tables is an important part of good database housekeeping, because it reorganizes the indexes and restores speedy access. Microsoft's SQL Server has a handy command that rebuilds all ...