MySQL 生成随机时间函数(转)
DROP FUNCTION IF EXISTS func_RandomDateTime; #USAGE: #SELECT func_RandomDateTime(DATE_FORMAT('2010-12-1 10:10:10','%Y-%m-%d %H:%i:%s'),DATE_FORMAT('2010-12-1 11:10:13','%Y-%m-%d %H:%i:%s')) AS t; # CREATE FUNCTION func_RandomDateTime( sd DATETIME, ed DATETIME) RETURNS DATETIME BEGIN DECLARE sub INT DEFAULT 0; DECLARE ret DATETIME; SET sub = ABS(UNIX_TIMESTAMP(ed)-UNIX_TIMESTAMP(sd)); SET ret = DATE_ADD(sd,INTERVAL FLOOR(1+RAND()*(sub-1)) SECOND); RETURN DATE_ADD(sd,INTERVAL FLOOR(1+RAND()*((ABS(UNIX_TIMESTAMP(ed)-UNIX_TIMESTAMP(sd)))-1)) SECOND); END;