Sql 将行拆分为12列
我有一张大概有1000行的桌子。其中一列是URL 所以,从表中选择URL 但是,我希望每行显示12个URL。原因是我们正在为人们在线发布工作,他们将一次浏览12个网站 因此,在本例中,我们将有大约90行被输出,每行有12列,除了最后一行短几列之外Sql 将行拆分为12列,sql,pivot,Sql,Pivot,我有一张大概有1000行的桌子。其中一列是URL 所以,从表中选择URL 但是,我希望每行显示12个URL。原因是我们正在为人们在线发布工作,他们将一次浏览12个网站 因此,在本例中,我们将有大约90行被输出,每行有12列,除了最后一行短几列之外 有没有一种简单的方法可以做到这一点?这是pivot还是其他功能的情况 带有动态枢轴的简单示例 CREATE TABLE dbo.Url ( Id int IDENTITY, url nvarchar(max) ) INSERT
有没有一种简单的方法可以做到这一点?这是pivot还是其他功能的情况 带有动态枢轴的简单示例
CREATE TABLE dbo.Url
(
Id int IDENTITY,
url nvarchar(max)
)
INSERT dbo.Url
VALUES ('http://www.url1.com'),
('http://www.url2.com'),
('http://www.url3.com'),
('http://www.url4.com')
DECLARE @cols AS nvarchar(MAX),
@query AS nvarchar(MAX)
SELECT @cols = STUFF((SELECT DISTINCT ',' + QUOTENAME(ROW_NUMBER() OVER (ORDER BY Url))
FROM dbo.url
GROUP BY Url
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
SET @query = 'SELECT' + @cols + ' FROM
(
SELECT Id, url
FROM dbo.url
) x
PIVOT
(
MAX(url)
FOR Id IN (' + @cols + ')
) p '
EXECUTE(@query)
这是在线解决方案。不过,这看起来可能有点复杂
declare @Temp_URLS table (URL nvarchar(128))
declare @Temp_Reviewers table (Name nvarchar(128))
insert into @Temp_Reviewers (Name)
select top 5
'Reviewer' +
right('0000' +
cast(row_number() over (order by number) as nvarchar(128)), 4)
from master.dbo.spt_values
insert into @Temp_URLS (URL)
select top 30
'http://URL' +
right('0000' +
cast(row_number() over (order by number) as nvarchar(128)), 4) + '.com'
from master.dbo.spt_values
select
Name,
[1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12]
from
(
select TT.Name, row_number() over (order by TT.Name asc) as RowNum
from @Temp_Reviewers as TT
) as R
outer apply
(
select top 12 TT.URL, row_number() over (order by TT.URL) as RowNum
from
(
select TTT.URL, 1 + row_number() over (order by TTT.URL asc) / 12 as RowNum
from @Temp_URLS as TTT
) as TT
where TT.RowNum = R.RowNum
) as CALC
pivot
(
min(CALC.URL)
for CALC.RowNum in
([1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12])
) as PVT
这是一个没有枢轴和行号的解决方案
declare @Temp_URLS table (URL nvarchar(128), csikey int identity(1, 1))
insert into @Temp_URLS (URL)
select top 30
'http://URL' +
right('0000' +
cast(row_number() over (order by number) as nvarchar(128)), 4) + '.com'
from master.dbo.spt_values
select
A.RowNum1,
min(case when A.RowNum2 = 1 then A.URL else null end) as [1],
min(case when A.RowNum2 = 2 then A.URL else null end) as [2],
min(case when A.RowNum2 = 3 then A.URL else null end) as [3],
min(case when A.RowNum2 = 4 then A.URL else null end) as [4],
min(case when A.RowNum2 = 5 then A.URL else null end) as [5],
min(case when A.RowNum2 = 6 then A.URL else null end) as [6],
min(case when A.RowNum2 = 7 then A.URL else null end) as [7],
min(case when A.RowNum2 = 8 then A.URL else null end) as [8],
min(case when A.RowNum2 = 9 then A.URL else null end) as [9],
min(case when A.RowNum2 = 10 then A.URL else null end) as [10],
min(case when A.RowNum2 = 11 then A.URL else null end) as [11],
min(case when A.RowNum2 = 12 then A.URL else null end) as [12]
from
(
select
T1.csikey, T1.URL,
count(T2.csikey) / 12 + 1 as RowNum1,
count(T2.csikey) % 12 + 1 as RowNum2
from @Temp_URLS as T1
left outer join @Temp_URLS as T2 on T2.csikey < T1.csikey
group by T1.csikey, T1.URL
) as A
group by A.RowNum1
请尝试以下查询,它在Oracle 11G中工作:
SELECT * FROM(
SELECT URL,
CAST(FLOOR((NUM+2)/3) AS INT) AS Row_Num,
MOD(NUM+2, 3)+1 AS OrderNum
FROM(
SELECT
ROW_NUMBER() OVER (ORDER BY URL) as NUM, URL
FROM
TBL_URL
)T1
)T2 PIVOT (MIN(URL) FOR OrderNum IN ('1' AS "1", '2' AS "2", '3' AS "3"));
对于从行中提取12个URL作为列,有什么标准吗?您可以使用LIMIT进行分页,但真正的解决方案不是在SQL查询中这样做,而是在软件的表示层中这样做。您使用的是什么RDBMS?SQL Server、mysql、oracle?谢谢Alexander,但我得到:Msg 1056,级别15,状态1,第1行选择列表中的元素数超过了允许的最大4096个元素数。Msg 102,15级,状态1,第5行“x”附近的语法不正确。你需要阅读以下文章:接受答案是如何工作的?只是一张便条。实际上,我们将所有必要的数据存储在一个表中。它有一列csikey,它是唯一的ID,但不是数字,还有一列b url。上面的查询是否可以轻松修改为只引用一个表?我也很乐意通过paypal为您提供一些帮助:我添加了一个没有rownumber和pivot的解决方案。不幸的是,我与甲骨文的关系不大