MySQL创建函数和存储过程，批量插入大数据

Posted 2020-12-12 加州水果

创建部门表和员工表

CREATE TABLE `dept` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `deptName` varchar(30) DEFAULT NULL,
  `address` varchar(40) DEFAULT NULL,
  `ceo` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10001 DEFAULT CHARSET=utf8



CREATE TABLE `emp` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `empno` int(11) NOT NULL,
  `name` varchar(20) DEFAULT NULL,
  `age` int(3) DEFAULT NULL,
  `deptId` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=500001 DEFAULT CHARSET=utf8

创建函数，随机生成字符串和部门编号

CREATE DEFINER=`root`@`%` FUNCTION `rand_num`(from_num INT ,to_num INT) RETURNS int(5)
begin
   declare i int default 0;
   set i=FLOOR(from_num +RAND()*(to_num -from_num+1));
 return i;
 end


CREATE DEFINER=`root`@`%` FUNCTION `rand_string`(n int) RETURNS varchar(255) CHARSET utf8
begin
   declare chars_str varchar(100) default ‘qwertyuiopasdfghjklzxcvbnm‘;
   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

创建存储过程

CREATE DEFINER=`root`@`%` PROCEDURE `insert_dept`(max_num int)
begin
declare i int default 0;
 set autocommit=0;
 repeat
 set i=i+1;
 insert into dept(deptname,address,ceo) values(rand_string(8),rand_string(10),rand_num(1,500000));
 until i=max_num 
 end repeat;
 commit;
 end



 CREATE DEFINER=`root`@`%` PROCEDURE `insert_emp`(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 emp(empno, NAME ,age ,deptid)
 values((start+i),rand_string(6),rand_num(30,50),rand_num(1,10000));
 until i=max_num 
 end repeat;
commit;
end

调用存储过程批量插入数据

call insert_dept(10000);

CALL insert_emp(100000,500000);