Question

sql查询，我用的php和mysql

我的意思就是在一个表中查询a字段包含
小麦专用的产品和查询b字段包含的小麦产品，但是b字段包含的小麦产品里面有a字段包含的产品，因为a字段里面有专用两个字
我现在就是想过滤一下，如果b字段包含的a字段的‘专用’就不让他显示出来

Answer 1

查询本周记录
select * from ht_invoice_information where WEEKOFYEAR(create_date)=WEEKOFYEAR(NOW());
#查询上周记录
select * from ht_invoice_information where create_date>=date_add(now(),interval -(8 + weekday(now())) day)
and create_date<=date_add(now(),interval -(1 + weekday(now())) day);

#或者
select * from `ht_invoice_information` where WEEKOFYEAR(create_date)=WEEKOFYEAR(DATE_SUB(now(),INTERVAL 1 week));
#查询本月数据
select * from ht_invoice_information where MONTH(create_date)=MONTH(NOW()) and year(create_date)=year(now());
#查询上月数据
select * from ht_invoice_information where create_date<=last_day(date_add(now(),interval -1 MONTH))
and create_date>=DATE_FORMAT(concat(extract(year_month from date_add(now(),interval -1 MONTH)),'01'),'%Y-%m-%d');
#或者
select * from `ht_invoice_information` where MONTH(create_date)=MONTH(DATE_SUB(NOW(),interval 1 month))
and year(create_date)=year(now());
#查询本季度数据
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now());
#查询上季度数据
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));
#查询本年数据
select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW());
#查询上年数据
select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year));

参考这个吧，很全了。

Answer 2

select case when b like '专用' then'' when b not like '专用' then b end from 表
语法我没测试 可能有问题
但是 编程在乎思路 结果其次