mysql怎么批量删除表

-- 假设要删除的表名存储在一个名为tables_to_delete的表中
DELIMITER //

CREATE PROCEDURE BatchDeleteTables()
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE tableName VARCHAR(255);
    DECLARE cur CURSOR FOR SELECT table_name FROM tables_to_delete;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

    OPEN cur;

    read_loop: LOOP
        FETCH cur INTO tableName;
        IF done THEN
            LEAVE read_loop;
        END IF;
        SET @drop_sql = CONCAT('DROP TABLE ', tableName);
        PREPARE stmt FROM @drop_sql;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;
    END LOOP;

    CLOSE cur;
END //

DELIMITER ;

-- 调用存储过程
CALL BatchDeleteTables();

DELIMITER //

CREATE PROCEDURE BatchDeleteTables()
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE tableName VARCHAR(255);
    DECLARE cur CURSOR FOR SELECT table_name FROM tables_to_delete;
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;

    OPEN cur;

    read_loop: LOOP
        FETCH cur INTO tableName;
        IF done THEN
            LEAVE read_loop;
        END IF;
        SET @check_sql = CONCAT('SELECT COUNT(*) INTO @exists FROM information_schema.tables WHERE table_schema = DATABASE() AND table_name = ''', tableName, '''');
        PREPARE check_stmt FROM @check_sql;
        EXECUTE check_stmt;
        DEALLOCATE PREPARE check_stmt;

        IF @exists = 0 THEN
            SELECT CONCAT('Table ', tableName, ' does not exist.') AS message;
        ELSE
            SET @drop_sql = CONCAT('DROP TABLE ', tableName);
            PREPARE stmt FROM @drop_sql;
            EXECUTE stmt;
            DEALLOCATE PREPARE stmt;
        END IF;
    END LOOP;

    CLOSE cur;
END //

DELIMITER ;

-- 调用存储过程
CALL BatchDeleteTables();