初始化mysql表格,让自动增加ID字段数字恢复为0
truncate table 表名
DATE_ADD(now(),INTERVAL 1 DAY);...
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 * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
select count(id),字段from 表名 group by字段 having count(字段)>1;...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...