mysql的自动补齐
设置my.cnf : auto-rehash
mysql>use mysql; #这是关键
减去一天SELECT DATE_SUB(CURDATE(), INTERVAL 1 DAY);减去一个小时hour(now())-1...
SELECT * FROM shop_count WHERE DATE(count_date)=current_date(); SELECT * FROM sho...
SELECT * FROM **** WHERE trim(字段名) REGEXP '[^0-9]'=1...
SELECT CURDATE()当天日期...
SELECT product_brand FROM shop_product WHERE LENGTH(product_brand)>...
select count(id),字段from 表名 group by字段 having count(字段)>1;...