MYSQL用存储过程创建百万级测试数据表

1.创建随机字符串函数，便于创建名称

-- delimiter $$
-- 执行出现“This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled
-- (you *might* want to use the less safe log_bin_trust_function_creators variable)” 错误时需要先设置log_bin_trust_function_creators
-- set global log_bin_trust_function_creators=1;DROP function if EXISTS rand_string;
#创建一个指定字符个数的函数
create function rand_string(n INT)
#返回字符串，注意：此处关键字是returns 而不是return
returns varchar(255)
BEGIN#定义一个临时变量，给变量赋值'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'DECLARE chars_str varchar(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';# 定义返回结果字符串DECLARE return_str varchar(255) DEFAULT '';DECLARE i int DEFAULT 0;WHILE i < n DOset return_str = CONCAT(return_str,SUBSTRING(chars_str,FLOOR(1+RAND()*52),1));set i=i+1;END while;RETURN return_str;
END

2.创建随机编号生成函数

drop function if exists rand_num;
CREATE function rand_num()
returns int(5)
BEGINDECLARE i int default 0;set i = FLOOR(10+RAND()*500);return i;
END

3.创建数据表 – 部门表 dept

drop table if EXISTS dept;
create table dept (deptno MEDIUMINT UNSIGNED not null DEFAULT 0,dname varchar(20) default '',ioc varchar(13) default''
) ENGINE = myisam default CHARSET ='utf8';
ALTER table dept add PRIMARY key(deptno);

4.创建数据表 – 员工表 emp

drop table if EXISTS emp;
CREATE TABLE `emp` (`empno` mediumint(8) unsigned NOT NULL DEFAULT '0',`ename` varchar(20) NOT NULL DEFAULT '',`job` varchar(9) NOT NULL DEFAULT '',`mgr` mediumint(8) unsigned NOT NULL DEFAULT '0' COMMENT '上级编号',`hiredate` date NOT NULL COMMENT '入职日期',`salary` decimal(7,2) NOT NULL COMMENT '薪水',`comm` decimal(7,2) NOT NULL COMMENT '红利',`deptno` mediumint(8) unsigned NOT NULL DEFAULT '0' COMMENT '部门编号'
) ENGINE=MYISAM DEFAULT CHARSET=utf8;

5.插入测试数据

drop PROCEDURE IF EXISTS insert_emp ;CREATE PROCEDURE insert_emp (in start_no int(10),in max_num int(10))BEGINDECLARE i int default 0;# 设置自动提交为falseset autocommit =0;# 开启循环REPEATset i = i+1;insert into emp values((start_no+i),rand_string(6),'SALESMAN',0001,CURDATE(),rand_num(),400,0002);UNTIL i=max_numEND REPEAT;
END