标签:排序 pre set 方向 列排序 sql cts href 过滤
目录
select prod_name from Products;
select prod_id,prod_name,prod_price from Products;
select * from Products;
select distinct prod_name from Products;
select prod_name from Products
limit 5 offset 4;
select prod_name from Products
limit 4,5;
select prod_id,prod_name,prod_price from Products; -- 这是一条注释
select prod_name from Products
order by prod_name;
select prod_id,prod_name,prod_price from Products
order by prod_price,prod_name;
select prod_id,prod_name,prod_price from Products
order by 2,3;
select prod_id,prod_name,prod_price from Products
order by prod_price,prod_name;
select prod_id,prod_name,prod_price from Products
order by prod_price desc,prod_name;
select prod_id,prod_name,prod_price from Products
order by prod_price desc,prod_name desc;
select prod_id,prod_name,prod_price from Products
where prod_price = 3.49;
= (等于)
<> (不等于)
!= (不等于)
< (小于)
<= (小于等于)
!< (不小于)
> (大于)
>= (大于等于)
!> (不大于)
BETWEEN (在指定两个值之间)
IS NULL (为null值)
select prod_id,prod_name,prod_price from Products
where prod_price < 10;
select prod_id,prod_name,prod_price from Products
where vend_id <> 'DLL01';
select prod_id,prod_name,prod_price from Products
where prod_price between 5 and 10;
select prod_id,prod_name,prod_price from Products
where prod_price IS NULL;
select prod_id,prod_name,prod_price from Products
where prod_price < 10 and prod_price > 5;
select prod_id,prod_name,prod_price from Products
where prod_price = 10 or prod_price = 5;
select prod_id,prod_name,prod_price from Products
where prod_price > 10 or prod_price < 5 and vend_id = 'DDL01';
select prod_id,prod_name,prod_price from Products
where (prod_price > 10 or prod_price < 5)
and vend_id = ' DDL01 ';
select prod_id,prod_name,prod_price from Products
where prod_price in (5,10,20);
select prod_id,prod_name,prod_price from Products
where NOT vend_id = 'DLL01';
select prod_id,prod_name,prod_price from Products
where vend_id <> 'DLL01';
标签:排序 pre set 方向 列排序 sql cts href 过滤
原文地址:https://www.cnblogs.com/Mario-mj/p/11443227.html