SQLServer行轉(zhuǎn)列實現(xiàn)思路記錄
發(fā)布日期：2021-12-28 14:43 | 文章來源：源碼之家
相關(guān)的數(shù)據(jù)表：
1.Score表
2.[User]表
SQL語句如下： --方法一：靜態(tài)SQL
SELECT * FROM
(SELECT UID,Name, Score,ScoreName FROM Score,[User] WHERE Score.UID=[User].ID) AS SourceTable
PIVOT(AVG(Score)FOR ScoreName IN ([英語], [數(shù)學(xué)])) AS a
--方法二：動態(tài)SQL
DECLARE @s NVARCHAR(4000)
SELECT @s = ISNULL(@s + ',', '') + QUOTENAME(ScoreName)
FROM (select distinct ScoreName from Score) as A ---列名不要重復(fù) Declare @sql NVARCHAR(4000)
SET @sql='
select r.* from
(select UID,Name,ScoreName,Score from Score,[User] where Score.UID=[User].ID) as t
pivot
(
max(t.Score)
for t.ScoreName in ('+@s+')
) as r'
EXEC( @sql)
--方法三：Case When
select
row_number() OVER(ORDER BY [User].ID) as 編號,
UID as 用戶編號,
Name as 姓名,
max(case ScoreName when '英語' then Score else 0 end) 英語,
max(case ScoreName when '數(shù)學(xué)' then Score else 0 end) 數(shù)學(xué)
from Score,[User] WHERE Score.UID=[User].ID
group by UID,[User].ID,Name
2.[User]表
SQL語句如下： --方法一：靜態(tài)SQL
復(fù)制代碼 代碼如下:
SELECT * FROM
(SELECT UID,Name, Score,ScoreName FROM Score,[User] WHERE Score.UID=[User].ID) AS SourceTable
PIVOT(AVG(Score)FOR ScoreName IN ([英語], [數(shù)學(xué)])) AS a
--方法二：動態(tài)SQL
復(fù)制代碼 代碼如下:
DECLARE @s NVARCHAR(4000)
SELECT @s = ISNULL(@s + ',', '') + QUOTENAME(ScoreName)
FROM (select distinct ScoreName from Score) as A ---列名不要重復(fù) Declare @sql NVARCHAR(4000)
SET @sql='
select r.* from
(select UID,Name,ScoreName,Score from Score,[User] where Score.UID=[User].ID) as t
pivot
(
max(t.Score)
for t.ScoreName in ('+@s+')
) as r'
EXEC( @sql)
--方法三：Case When
復(fù)制代碼 代碼如下:
select
row_number() OVER(ORDER BY [User].ID) as 編號,
UID as 用戶編號,
Name as 姓名,
max(case ScoreName when '英語' then Score else 0 end) 英語,
max(case ScoreName when '數(shù)學(xué)' then Score else 0 end) 數(shù)學(xué)
from Score,[User] WHERE Score.UID=[User].ID
group by UID,[User].ID,Name
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