Mysql利用存储过程插入400W条数据

CREATE TABLE dept( /*部门表*/
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0, /*编号*/
dname VARCHAR(20) NOT NULL DEFAULT "",/*名称*/
loc VARCHAR(13) NOT NULL DEFAULT "" /*地点*/
)ENGINE=MyISAM DEFAULT CHARSET=utf8;

CREATE TABLE emp( /*EMP雇员表*/
empno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,/*编号*/
ename VARCHAR(20) NOT NULL DEFAULT "",/*名字*/
job VARCHAR(9) NOT NULL DEFAULT "",/*工作*/
mgr MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,/*是哪个及编号*/
hiredate DATE NOT NULL,/*入职时间*/
sal DECIMAL(7,2) NOT NULL,/*薪水*/
comm DECIMAL(7,2) NOT NULL,/*红利*/
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0 /*部门编号*/
)ENGINE=MyISAM DEFAULT CHARSET=utf8

CREATE TABLE salgrade( /*工资级别表*/
grade MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,
losal DECIMAL(17,2) NOT NULL,
hisal DECIMAL(17,2) NOT NULL
)ENGINE=MyISAM DEFAULT CHARSET=utf8;

INSERT INTO salgrade VALUES (1,700,1200);
INSERT INTO salgrade VALUES (2,1201,1400);
INSERT INTO salgrade VALUES (3,1401,2000);
INSERT INTO salgrade VALUES (4,2001,3000);
INSERT INTO salgrade VALUES (5,3001,9999);

#随机产生字符串
#定义一个新的命令结束符
delimiter $$
#删除自动以函数
drop function rand_string $$

创建函数：

#rand_string(n INT) rand_string 是函数名(n INT)  //该函数传参一个整数
create function rand_string(n INT)
returns varchar(255)
begin
declare chars_str varchar(100) default
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
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 $$

再来一个函数

create function rand_num( )
returns int(5)
begin
declare i int default 0;
set i = floor(10+rand()*500);
return i;
end $$

创建存储过程

create procedure insert_emp(in start int(10),in max_num int(10))
begin
declare i int default 0;
#set autocommit = 0 把autocommit设置成0
set autocommit = 0;
repeat
set i = i +1;
insert into emp values ((start+i),rand_string(6),'SALESMAN',0001,curdate(),2000,400,rand_num());
until i = max_num
end repeat;
commit;
end $$

delimiter ;

调用刚刚写好的函数，从100001号开始,产生4000000记录

call insert_emp(100001,4000000);