mysql中列出所有表并显示其数据

SHOW TABLES;

SELECT * FROM users;

SELECT * FROM users ORDER BY id ASC;

DELIMITER //

CREATE PROCEDURE ListTablesAndData()
BEGIN
    DECLARE done INT DEFAULT FALSE;
    DECLARE tableName VARCHAR(255);
    DECLARE cur CURSOR FOR SELECT table_name FROM information_schema.tables WHERE table_schema = DATABASE();
    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 @sql = CONCAT('SELECT * FROM ', tableName, ' LIMIT 5');
        PREPARE stmt FROM @sql;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;
    END LOOP;

    CLOSE cur;
END //

DELIMITER ;

CALL ListTablesAndData();