PREPARE prepares a statement for execution
EXECUTE executes a prepared statement
DEALLOCATE PREPARE releases a prepared statement
SET @s = 'SELECT SQRT(POW(?,2) + POW(?,2)) AS hypotenuse';
PREPARE stmt2 FROM @s;
SET @a = 6;
SET @b = 8;
EXECUTE stmt2 USING @a, @b;
Result:
+------------+
|...