基于MYSQL存储过程生成1-10万,不重复随机数.

基于MYSQL存储过程生成1-10万,不重复随机数.

DELIMITER //

/*创建生成随机数存储过程*/
DROP PROCEDURE IF EXISTS RD1 //
CREATE PROCEDURE RD1()
BEGIN
DECLARE NM int;#定义变量
DECLARE RW int;#定义变量
DECLARE MN int;#定义变量

/*创建需要用到临时表1*/
DROP TABLE IF EXISTS TMP_TEST1;
CREATE TEMPORARY TABLE TMP_TEST1(
ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
NUM INT NOT NULL
)ENGINE=MEMORY,CHARSET=utf8;

/*创建需要用到临时表2*/
DROP TABLE if exists TMP_TEST2;
CREATE TEMPORARY TABLE TMP_TEST2(
ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
NUM INT NOT NULL
)ENGINE=MEMORY,CHARSET=utf8;
SET RW = 100000;#给变量赋予初始值10万7
SET MN = (SELECT CAST(REPLACE(LEFT(CURDATE(),7),'-','') AS UNSIGNED INTEGER));#获得当前时间如:201702 这样的格式
WHILE RW > 0 DO#循环开始
SET NM = (SELECT ROUND(RAND()*100000));#随机数种子
INSERT INTO TMP_TEST1(`NUM`) VALUES(NM);#写入临时表
SET RW = RW - 1;
END WHILE;
INSERT INTO TMP_TEST2(`NUM`) SELECT ID FROM TMP_TEST1 ORDER BY NUM ASC;#从临时表1转移数据到临时表2通过order by来生成随机数
INSERT INTO RECORD_RM (`ID_RM`,`NUM`,`THEMONTH`) SELECT ID,NUM,(select MN) FROM TMP_TEST2;#从临时表2把数据导入到正式表
END //#存储过程结束
CALL RD1() //#调用存储过程
DROP PROCEDURE RD1//#删除存储过程
DELIMITER ;

附上RECORD_RM表建表SQL:

DROP TABLE IF EXISTS RECORD_RM;
CREATE TABLE RECORD_RM(
ID_RM INT UNSIGNED NOT NULL,
THEMONTH INT UNSIGNED NOT NULL,
NUM INT UNSIGNED NOT NULL,
PRIMARY KEY(ID_RM,THEMONTH)
)ENGINE=MYISAM,CHARSET=utf8;

总体执行速度10S以内,算是相对较快了.如果有好的办法,希望能在下面评论告诉我下,谢谢!

转载于:https://www.cnblogs.com/phperly/p/6425405.html