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 take several seconds; with the ...

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 ...

A table does not become tables when you add rows to it, because a table already represents a collection.<BR><BR>The "plural" option should be generalized to "collection", because a collective word is ...