生成随机英文字符 delimiter $$ drop function if exists rand_string; create function rand_string(n int) returns varchar(255) begin declare chars_str varchar(52) default 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; declare return_str varchar(255) default ''; declare i int default 0; while i<n do set return_str=concat(return_str,substring(chars_str,floor(1+rand()*52),1)); set i=i+1; end while; return return_str; end $$
生成随机汉字
drop function if exists rand_name;
delimiter //
-- 生成用户姓名
create definer=`root`@`IP地址` function `rand_name`(n int) returns varchar(255) charset utf8
begin
declare char_str varchar(255) default '哈哈章与张霞笑小欧由于语塔堆太湖想笑一二三四五六七八九十宇宇你是最耀眼的星星再干一杯永远生命不过短暂的烟火爱你所爱无问西东';
declare return_name varchar(255) default '';
declare i int default 0;
while i < n do
set return_name = concat(return_name, substring(char_str, floor(1+rand()*30),1));
set i = i + 1;
end while;
return return_name;
end//
delimiter ;
生成随机数字
-- 生成电话号码
drop function if exists `phone_head`;
delimiter //
create definer=`root`@IP地址` function `phone_head`() returns char(3) charset utf8
begin
declare head char(3);
declare bodys varchar(225) default'130 131 132 133 134 135 136 137 138 139 186 187 189 151 157';
declare starts int;
set starts = 1 + floor(rand()*15)*4 ;
set head =trim(substring(bodys,starts,3));
return head;
end//
delimiter ;
-- 生成随机数字串
drop function if exists `rand_string`;
delimiter //
create definer=`root`@`IP地址` function `rand_string`(n int) returns varchar(255) charset utf8
begin
declare char_str varchar(255) default '0123456789';
declare return_str varchar(255) default '';
declare i int default 0;
while i < n do
set return_str=concat(return_str,substring(char_str,floor(1+rand()*10),1));
set i=i+1;
end while;
return return_str;
end //
delimiter ;
drop function if exists `get_phone`;
delimiter //
create definer=`root`@`IP地址` function `get_phone`() returns varchar(20) charset utf8
begin
declare phone varchar(20);
set phone = trim(concat(phone_head(),rand_string(8)));
return phone;
end //
delimiter ;
生成任意时间:
-- 随机生成一个1949年到1999之间的日期
drop function if exists `randDate`;
delimiter //
create definer=`root`@`IP地址` function `randDate`(n year) returns varchar(255) charset utf8
begin
declare aDate char(10) default '';
set aDate=concat(n+floor((rand()*50)),'-',
lpad(floor(2 + (rand() * 11)),2,0),'-',
lpad(floor(3 + (rand() * 20)),2,0));
return aDate;
end//
delimiter ;
-- 函数randDatetime:随机生成一个时间点函数
drop function if exists `randDatetime`;
delimiter //
create definer=`root`@`IP地址` function `randDatetime`(n year, num int) returns varchar(255) charset utf8
begin
declare aDatetime varchar(255) default '';
set aDatetime=concat(concat(n+floor((rand()*num)),'-',
lpad(floor(2 + (rand() * 11)),2,0),'-',
lpad(floor(3 + (rand() * 25)),2,0)),
' ',
concat(lpad(floor(0 + (rand() * 23)),2,0),':',
lpad(floor(0 + (rand() * 60)),2,0),':',
lpad(floor(0 + (rand() * 60)),2,0)));
return aDatetime;
end//
delimiter ;