动态生成SQL执行语句

SET @qry = 'SELECT product_cd, name, product_type_cd, date_offered, date_retired
FROM product 
WHERE product_cd = ?';

PREPARE dynsql2 FROM @qry;

SET @prodcd = 'CHK';

EXECUTE dynsql2 USING @prodcd;

SET @prodcd = 'SAV';

EXECUTE dynsql2 USING @prodcd;

DEALLOCATE PREPARE dynsql2;