SELECT is used to retrieve rows selected from one or more tables.
Support for UNION statements and subqueries is available as of MySQL
4.0 and 4.1, respectively.
See [UNION,  , UNION] and [Subqueries].

 --- Each select_expr indicates a column you want to retrieve.

 --- table_references indicates the table or tables from which to retrieve rows.
Its syntax is described in [JOIN,  , JOIN].

 --- where_definition indicates any conditions that selected rows must
satisfy.


SELECT can also be used to retrieve rows computed without reference to
any table.  
