MySQL判断字符串是否是数字
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1
DATE_ADD(now(),INTERVAL 1 DAY);...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...
truncate table 表名...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
update 表名 SET log_Content = REPLACE(log_Content,'"upload','"/upload')...