Creates indexes on columns in tables. Restriction: You cannot use CREATE INDEX on a table accessed via an engine that does not support UPDATE processing. an IN subquery where the column in the inner ...

The DICTIONARY tables component is specified in the FROM clause of a SELECT statement. DICTIONARY is a reserved libref for use only in PROC SQL. Data from DICTIONARY tables are generated at run time.

Community driven content discussing all aspects of software development from DevOps to design patterns. Once you’ve installed SQLite, you’ll probably want to learn how to maneuver around the ...

Using table indexes in databases enables you to find information within the database faster and more efficiently than not using table indexes. The two index types that are commonly used in database ...

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 ...