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1.创建函数(1.批量生成英文随机数 2.批量生成部门代码)
- 创建随机函数
delimiter $$
create function rand_string(n int)RETURNs VARCHAR(255)
BEGIN
DECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
DECLARE return_str VARCHAR(255) DEFAULT '';
DECLARE i int DEFAULT 0;
while i <n DO
set return_str=CONCAT(return_str,SUBSTRING(chars_str,FLOOR(1+rand()*52),1));
set i=i+1;
end while;
return return_str;
END $$
- 创建随机数
delimiter $$
create function rand_num()RETURNs int(5)
BEGIN
DECLARE i int DEFAULT 0;
set i =FLOOR(100+rand()*10);
return i;
END $$
2.创建存储过程:(1.往emp表插入 2.往dept表插入)
- 往emp表插入
create 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,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
- 往dept表插入
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
//Celimiter; //换为;
//结束 call insert_emp(1000001,500000)//调用上面存储过程
插入10条试试:call insert_emp(100,10)
结果: