标签“ mysql ”下的所有文章
//假定当前日期为2021-03-28
date_sub('2021-03-28',interval 1 day) 表示 2021-03-27
date_sub('2021-03-28',int...
ALTER TABLE `table_name` ADD `uptime` timestamp on update current_timestamp;
SET @r = 0;
SET @l = 0;
SET @s = 1;
UPDATE `数据表` SET `名次列` = (
CASE
WHEN `排名值列` = @l THEN @r := @...
MYSQL数据表操作拷贝table1的全部数据到table2INSERT INTO table2 SELECT * FROM table1拷贝table1的第n条数据到table2INSERT ...
设表格为t身份证号码列为sfz,生日列为sr,性别列为xb:UPDATE `t` SET `sr`=cast(substring(sfz,7,8) as date) WHERE 1
//提取表t...