CREATE INDEX constructs an index, name, on the specified table. Indexes are primarily used to enhance database performance (though inappropriate use will result in slower performance). The key field(s ...

An index stores both the values of a table's columns and a system of directions that enable access to rows in that table by index value. Defining an index on a column or set of columns enables SAS, ...

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 ...