查询重复数据mysql
select count(id),字段from 表名 group by字段 having count(字段)>1;
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
1.date型转换成int型 UNIX_TIMESTAMP('2007-10-04 22:23:00') 2.int型转换成date型 FROM_UNIXTIME(97599...
DATE_ADD(now(),INTERVAL 1 DAY);...
truncate table 表名...
判断字符串(string)中是否包含另一个字符串(subStr)locate(subStr,string) :函数返回subStr在string中出现的位置实际运用SELECT LOCAT...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...