查询重复数据mysql
select count(id),字段from 表名 group by字段 having count(字段)>1;
是由表格字段ID的数据库类型造成的,smallint最大数值就是65535,修改成int就可以了...
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1...
DATE_ADD(now(),INTERVAL 1 DAY);...
SELECT CURDATE()当天日期...
DELETE t1 FROM invest_year t1, invest_year t2 WHERE t1.pro_id = t2.pro_id AND t1.pro_year = t...