mysql插入大数据

/*部门表*/
CREATE TABLE dept(
 id INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,  /*id*/
 deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT , /*编号*/
 dname VARCHAR() NOT NULL DEFAULT "",/*名称*/
 loc VARCHAR() NOT NULL DEFAULT "" /*地点*/
)ENGINE=MyISAM DEFAULT CHARSET=utf8;

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

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

show variables like 'log_bin_trust_function_creators';
set global log_bin_trust_function_creators = ;
-- 注意命令结束符

#定义一个新的命令结束符
delimiter $$
#rand_string(n INT) rand_string 是函数名(n INT)  //该函数传参一个整数
create function rand_string(n INT)
returns varchar()
begin
declare chars_str varchar() default
 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
declare return_str varchar() default '';
declare i int default ;
while i < n do
 set return_str=concat(return_str,substring(chars_str,floor(+rand()*),));
 set i = i +;
 end while;
return return_str;
end $$

#定义一个新的命令结束符
delimiter $$
-- 生成部门号函数
create function rand_num( )
returns int()
begin
 declare i int default ;
 set i = floor(+rand()*);
return i;
 end $$

#定义一个新的命令结束符
delimiter $$
create procedure insert_emp(in start int(),in max_num int())
begin
declare i int default ;
#set autocommit =   //把autocommit设置成0，这样可以只提交一次，否则。。。。。
set autocommit = ;
repeat
set i = i +;
insert into emp (empno, ename,job,mgr,hiredate,sal,comm,deptno) values ((start+i),rand_string(),'SALESMAN',,curdate(),,,rand_num());
until i = max_num
end repeat;
commit;
end $$

call insert_emp(,);