#創(chuàng)建表DEPT

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CREATE TABLE dept( /*部門表*/
deptno MEDIUMINT?? UNSIGNED? NOT NULL? DEFAULT 0,
dname VARCHAR(20)? NOT NULL? DEFAULT "",
loc VARCHAR(13) NOT NULL DEFAULT ""
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;

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#創(chuàng)建表EMP雇員
CREATE TABLE emp
(empno? MEDIUMINT UNSIGNED? NOT NULL? DEFAULT 0,
ename VARCHAR(20) NOT NULL DEFAULT "",
job VARCHAR(9) NOT NULL DEFAULT "",
mgr MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,
hiredate DATE NOT NULL,
sal DECIMAL(7,2)? NOT NULL,
comm DECIMAL(7,2) NOT NULL,
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0
)ENGINE=MyISAM DEFAULT CHARSET=utf8 ;

#工資級別表
CREATE TABLE salgrade
(
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);

# 隨機產(chǎn)生字符串
#定義一個新的命令結(jié)束符合
delimiter $$
#刪除自定的函數(shù)
drop? function rand_string $$

#這里我創(chuàng)建了一個函數(shù).

create function rand_string(n INT)
returns varchar(255)
begin
?declare chars_str varchar(100) default
?? 'abcdefghijklmnopqrstuvwxyz媒體DEFJHIJKLMNOPQRSTUVWXYZ';
?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 $$

delimiter ;
select rand_string(6);

# 隨機產(chǎn)生部門編號
delimiter $$
drop? function rand_num $$

#這里我們又自定了一個函數(shù)
create function rand_num( )
returns int(5)
begin
?declare i int default 0;
?set i = floor(10+rand()*500);
return i;
? end $$

delimiter ;
select rand_num();

#******************************************
#向emp表中插入記錄(海量的數(shù)據(jù))

delimiter $$
drop procedure insert_emp $$

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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 values ((start+i) ,rand_string(6),'SALESMAN',0001,curdate(),2000,400,rand_num());
? until i = max_num
?end repeat;
?? commit;
?end $$

delimiter ;
#調(diào)用剛剛寫好的函數(shù), 1800000條記錄,從100001號開始
call insert_emp(100001,1800000);

#**************************************************************
#? 向dept表中插入記錄

delimiter $$
drop procedure insert_dept $$

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 values ((start+i) ,rand_string(10),rand_string(8));
? until i = max_num
?end repeat;
?? commit;
?end $$

delimiter ;
call insert_dept(100,10);

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#------------------------------------------------
#向salgrade 表插入數(shù)據(jù)
delimiter $$
drop procedure insert_salgrade $$
create procedure insert_salgrade(in start int(10),in max_num int(10))
begin
declare i int default 0;
?set autocommit = 0;
?ALTER TABLE emp DISABLE KEYS;?
?repeat
?set i = i + 1;
?insert into salgrade values ((start+i) ,(start+i),(start+i));
? until i = max_num
?end repeat;
?? commit;
?end $$
delimiter ;
#測試不需要了
#call insert_salgrade(10000,1000000);

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