mysql empty a table
-- If you do not need a condition or limit the rows:
TRUNCATE TABLE tblYourTable; -- Not Foreign key constrained
-- Or
SET FOREIGN_KEY_CHECKS = 0;
TRUNCATE YourTable1;
TRUNCATE YourTable2;
SET FOREIGN_KEY_CHECKS = 1;
-- --------------------------------------------------------
-- Otherwise:
DELETE FROM tblYourTable WHERE condition;
-- Or
DELETE FROM tblYourTable LIMIT row_count;