付出了很大的努力，是的。
SET @db = 'db1';SET @q = CONCAt('SELECt * FROM ', @db, '.mycol');PREPARE stmt FROM @q;EXECUTE stmt;DEALLOCATE PREPARE stmt;
付出了很大的努力，是的。
SET @db = 'db1';SET @q = CONCAt('SELECt * FROM ', @db, '.mycol');PREPARE stmt FROM @q;EXECUTE stmt;DEALLOCATE PREPARE stmt;名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
