--rank 排序(每個分組進行單獨排名,相同名次的會佔位,比如兩個第二名,就沒有第三名了,直接到第四名)
select fenxiaoid,price,
rank() over( --使用rank() 進行排名
partition by fenxiaoid --使用fenxiaoid進行分組
order by price desc --使用price進行排序
) as paiming
from paymentorder
--dense_rank排序(名次不佔位,其他和rank一樣)
select fenxiaoid,price,
dense_rank() over( --使用dense_rank() 進行排名
partition by fenxiaoid --使用fenxiaoid進行分組
order by price desc --使用price進行排序
) as paiming
from paymentorder
--ntile()函式進行分組,指定範圍
select fenxiaoid,price,
ntile(5) over( --使用ntile()只能排序直到5
order by price desc --使用price進行排序
) as paiming
from paymentorder
----ntile()使用場景
select fenxiaoid,price,
case ntile(4) over (order by price desc)
when 1 then '25%'
when 2 then '25%-50%'
when 3 then '50%-75%'
when 4 then '75%-100%' end as level
from paymentorder
--row_number() 函式 分頁示例
----建立分頁儲存過程
create proc pro_userinfo_getpageuserinfos
@pagesize int,
@pageindex int,
@totalcount int output
asselect * from (
select *,row_number() over(order by userid asc) as rownum from userinfo
) as t
where t.rownum between ((@pageindex-1)*@pagesize+1) and (@pagesize*@pageindex)
select @totalcount=count(1) from userinfo;
--捕獲異常
begin try
select price/0 from paymentorder
end try
begin catch
select error_line(),error_number(),error_severity(),error_message()
end catch
--使用pivot 進行行轉列 [值],行記錄裡有多少值,方括號裡就要寫多少值,注意下
select fenxiaoid,
[1] as "一月份",
[2] as "二月份",
[3] as "三月份",
[4] as "四月份",
[5] as "五月份",
[6] as "六月份",
[7] as "七月份",
[8] as "八月份",
[9] as "九月份",
[10] as "十月份",
[11] as "十一月份",
[12] as "十二月份"
from
(select c.fenxiaoid,sum(c.price) sumprice,month(c.confirmdate) monthnumber from paymentorder c where c.confirmdate>'2016-1-1' group by month(c.confirmdate),c.fenxiaoid) aa
pivot --進行轉列操作
(sum(sumprice)
for monthnumber in
([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
) as months;
--使用unpivot 進行列轉行
select tableid,ziduan,jiage from (
select top 3 a.tableid,a.payprice,a.price,a.youhui from paymentorder a) aa
unpivot (
jiage
for ziduan in
([price],[payprice],[youhui])
) as unpvt
--將資料刪除,然後將刪除的資料輸出,類似的還有 inserted updated
delete from paymentorder
output deleted.*
where tableid=1
--使用變數的top 查詢
declare @p int
set @p=100
select top(@p) * from paymentorder;
--使用tablesample 示例資料
select * from paymentorder tablesample(10 percent);--獲取10%的資料
select * from paymentorder tablesample(200 rows);--獲取大約200行的資料
--使用累加運算子
declare @i int=2
set @i*=2 --累加運算
print @i;
--一次插入多條資料
create table #t (c1 int,c2 nvarchar(10));
insert #t values (1,'a'),(2,'b')
select c1,c2,c3 from #t
inner join
(values(1,'aa'),(3,'cc') --內連線多條資料
) t (c3,c4) on #t.c1=t.c3
--grouping sets 的使用,不同字段分別分組,然後合併(不同於不同字段同時分組的情況)
select fenxiaoid,xingshiid,count(1) from paymentorder
group by grouping sets(fenxiaoid,xingshiid)
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