MySQL Information Functions

Name	Description
BENCHMARK()	Repeatedly execute an expression
CHARSET()(v4.1.0)	Return the character set of the argument
COERCIBILITY()(v4.1.1)	Return the collation coercibility value of the string argument
COLLATION()(v4.1.0)	Return the collation of the string argument
CONNECTION_ID()	Return the connection ID (thread ID) for the connection
CURRENT_USER(), CURRENT_USER	Return the username and hostname combination
DATABASE()	Return the default (current) database name
FOUND_ROWS()	For a SELECT with a LIMIT clause, the number of rows that would be returned were there no LIMIT clause
LAST_INSERT_ID()	Value of the AUTOINCREMENT column for the last INSERT
ROW_COUNT()(v5.0.1)	The number of rows updated
SCHEMA()(v5.0.2)	A synonym for DATABASE()
SESSION_USER()	Synonym for USER()
SYSTEM_USER()	Synonym for USER()
USER()	Return the current username and hostname
VERSION()	Returns a string that indicates the MySQL server version