MYSQL批量插入数据-存储过程

随机生成字符串
DELIMITER $$
CREATE function rand_string(n INT) RETURNS VARCHAR (255)
BEGIN 
	DECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghigklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXYZ';
	DECLARE return_str VARCHAR(255) DEFAULT '';
	DECLARE i INT DEFAULT 0;
	WHILE i < n DO
	SET return_str = CONCAT(return_str,SUBSTRING(chars_str,FLOOR(1+RAND()*52),1));
	SET i = i+1;
	END WHILE;
	RETURN return_str;
END $$;

随机生成部门编号
DELIMITER $$
CREATE FUNCTION rand_num()
RETURNS INT(5)
BEGIN
DECLARE i INT DEFAULT 0;
SET i = FLOOR(100+RAND()*10);
RETURN i;
END $$

创建存储过程

向表emp插入数据
DELIMITER $$
CREATE PROCEDURE insert_emp(IN START INT(10),IN max_num INT(10))
BEGIN
DECLARE i INT DEFAULT 0;
#关闭sql的自动提交
SET autocommit = 0;
REPEAT
	SET i=i+1;
	INSERT INTO emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES((start
	+i),rand_string(6),'SALESMAN',0001,CURDATE(),2000,400,rand_num());
	UNTIL i=max_num
	END REPEAT;
	COMMIT;
END $$

向表dept插入数据
ELIMITER $$
CREATE PROCEDURE insert_dept(IN START int(10),IN max_num INT(10))
BEGIN
DECLARE i INT DEFAULT 0;
SET autocommit = 0;
REPEAT
	SET i = i+1;
	INSERT INTO dept(deptno,dname,loc) VALUES ((START+i),rand_string(10),rand_string(8));
	UNTIL i = max_num
	END REPEAT;
	COMMIT;
END $$;

调用存储过程
通过CALL进行调用，存储过程~

500000条数据插入执行了50s左右；

本文地址：https://blog.csdn.net/weixin_44555577/article/details/107603489