# Create a database
the CREATE DATABASE BigData
# use database
USE bigdata
#创建表
CREATE TABLE dept(
id INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,
dname VARCHAR(20) NOT NULL DEFAULT '',
loc VARCHAR(13) NOT NULL DEFAULT ''
) ENGINE = INNODB DEFAULT CHARSET =GBK;
# Create a table
the CREATE TABLE emp (
the above mentioned id INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
empno MEDIUMINT UNSIGNED the NOT NULL the DEFAULT 0, / * number * /
ename VARCHAR (20) the NOT NULL the DEFAULT '', / * name * /
the Job VARCHAR (9) the NOT NULL DEFAULT '', / * work * /
MGR MEDIUMINT UNSIGNED the NOT NULL the DEFAULT 0, / * the higher number * /
the HireDate DATE the NOT NULL, / * entry time * /
SAL DECIMAL (7,2) the NOT NULL, / * salary * /
COMM DECIMAL (7,2) NOT NULL, / * bonus * /
deptno MEDIUMINT UNSIGNED the NOT NULL the DEFAULT 0 / * department number * /
) ENGINE =INNODB DEFAULT CHARSET=gbk;;
# Create a random number generation function
DELIMITER $$
the CREATE rand_num the FUNCTION ()
the RETURNS the INT (. 5)
the BEGIN
the DECLARE the DEFAULT the INT 0 I;
the SET I = the FLOOR (100 + the RAND () * 10);
the RETURN I;
the END $$
DELIMITER;
#创建产生随机字符串的函数
DELIMITER $$
CREATE FUNCTION rand_string(n INT) RETURNS VARCHAR(255)
BEGIN
DECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
DECLARE return_str VARCHAR(255) DEFAULT '';
DECLARE i INT DEFAULT 0;
WHILE i<n DO
SET return_str=CONCAT(return_str,SUBSTRING(chars_str,FLOOR(1+RAND()*52),1));
SET i=i+1;
END WHILE;
RETURN return_str;
END $$
DELIMITER ;
SHOW GLOBAL VARIABLES LIKE '%log_bin%'
#创建插入的存储过程
DELIMITER $$
CREATE PROCEDURE insert_dept(IN START INT(10),IN max_num INT(10))
BEGIN
DECLARE i INT DEFAULT 0;
REPEAT
SET i=i+1;
INSERT INTO dept (deptno,dname,loc) VALUES((START+i),rand_string(10),rand_string(8));
UNTIL i=max_num
END REPEAT;
COMMIT;
END $$
DELIMITER ;
#创建插入的存储过程
DELIMITER $$
CREATE PROCEDURE insert_emp(IN START INT(10),IN max_num INT(10))
BEGIN
DECLARE i INT DEFAULT 0;
SET autocommit=0;
REPEAT
SET i=i+1;
INSERT INTO emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) VALUES ((START+i),rand_string(6),'SALESMAN',0001,CURDATE(),2000,400,rand_num());
UNTIL i =max_num
END REPEAT;
COMMIT;
END $$
DELIMITER ;
# Call a stored procedure
CALL insert_dept (51,100000000);
SELECT * FROM dept;
CALL insert_emp(1500000,10000000);
SELECT * FROM emp;
SELECT COUNT(id) FROM emp;
SELECT FLOOR(1+RAND()*52);
SELECT RAND()*52;