SQL Server 行列转换
一 行转列
1多行转成一列（并以","隔开）
SELECT name ,
value = ( STUFF(( SELECT ',' + value
FROM A
WHERE name = Test.name
FOR
XML PATH('')
), 1, 1, '') )
FROM A AS Test
GROUP BY name;附STUFF用法：（从原字符的第二个开始共三个字符替换为后面的字符）
SELECT STUFF('abcdef', 2, 3, 'ijklmn'); 2 SQL Server 2000静态SQL通过group by 、max语句进行行转列静态SQL
select a.MemberId,a.Age,a.Gender,a.ColorectalCancerFamilyHistory,a.ProstateCancerFamilyHistory,
max(CASE a.Conidtion WHEN 'Colorectal Cancer' THEN a.RiskScore ELSE '' end) ColorectalCancerRiskScore,
max(CASE a.Conidtion WHEN 'Colorectal Cancer' THEN a.RiskLevel ELSE '' end) ColorectalCancerRiskLevel,
max(CASE a.Conidtion WHEN 'Prostate Cancer' THEN a.RiskScore ELSE '' end) ProstateCancerIPSSScore,
max(CASE a.Conidtion WHEN 'Prostate Cancer' THEN a.RiskLevel ELSE '' end) ProstateCancerRiskLevel,
max(CASE a.Conidtion WHEN 'Diabetes Mellitus' THEN a.RiskLevel ELSE '' end) DiabetesMellitusRiskLevel,
max(CASE a.Conidtion WHEN 'Breast Cancer' THEN a.RiskScore ELSE '' end) BreastCancerAbsoluteRisk,
max(CASE a.Conidtion WHEN 'Breast Cancer' THEN a.RiskLevel ELSE '' end) BreastCancerRiskLevel,
max(CASE a.Conidtion WHEN 'Heart Disease/Stroke' THEN a.RiskScore ELSE '' end) CardiovascularDiseaseRiskScore,
max(CASE a.Conidtion WHEN 'Heart Disease/Stroke' THEN a.RiskLevel ELSE '' end) CardiovascularDiseaseRiskLevel,
max(CASE a.Conidtion WHEN 'Blood pressure' THEN a.RiskLevel ELSE '' end) BloodPressureRiskLevel,
max(CASE a.Conidtion WHEN 'Body Mass Index' THEN a.RiskLevel ELSE '' end) BodyMassIndexRiskLevel,
max(CASE a.Conidtion WHEN 'Cholesterol' THEN a.RiskLevel ELSE '' end) BloodLipidCholesterolRiskLevel,
max(CASE a.Conidtion WHEN 'Mental Health' THEN a.RiskLevel ELSE '' end) MentalHealthRiskLevel
from
(select tc.member_id MemberId,
SUBSTRING(ti.informationjson, CHARINDEX('"age":', ti.informationjson) + LEN('"age":'),
CHARINDEX(',"gender"', ti.informationjson) - CHARINDEX('"age":', ti.informationjson)
- LEN('"age":'))Age,
SUBSTRING(ti.informationjson, CHARINDEX('"gender":"', ti.informationjson) + LEN('"gender":"'),
CHARINDEX('","from"', ti.informationjson) - CHARINDEX('"gender":"', ti.informationjson)
- LEN('"gender":"')) Gender,
case SUBSTRING(ti.informationjson, CHARINDEX('"colCancer":"', ti.informationjson) + LEN('"colCancer":"'),
CHARINDEX('","diaMell"', ti.informationjson) - CHARINDEX('"colCancer":"', ti.informationjson)
- LEN('"colCancer":"')) when 'A' then 'Yes' when 'B' then 'No' else 'NA' end ColorectalCancerFamilyHistory,
case SUBSTRING(ti.informationjson, CHARINDEX('"pc":"', ti.informationjson) + LEN('"pc":"'),
CHARINDEX('","oc"', ti.informationjson) - CHARINDEX('"pc":"', ti.informationjson)
- LEN('"pc":"')) when 'A' then 'Yes' when 'B' then 'No' else 'NA' end ProstateCancerFamilyHistory,
tc.condition Conidtion,
case tc.result when 'A' then 'Yes' when 'B' then 'NA' else replace(replace(tc.result,'<','<'),'>','>') end RiskScore,
tc.interpretation RiskLevel
from twh_calculate_result tc,twh_online_survey_information ti,twh_user tu where tc.member_id=ti.member_id and tc.member_id=tu.member_id and tu.clntcode='16163') a
group by a.MemberId,a.Age,a.Gender,a.ColorectalCancerFamilyHistory,a.ProstateCancerFamilyHistory
order by a.MemberId asc3、使用SQL Server 2005静态SQL
SELECT *
FROM tb PIVOT( MAX(分数) FOR 课程 IN ( 语文, 数学, 物理 ) ) a;4、使用SQL Server 2005动态SQL
--使用stuff()
DECLARE @sql VARCHAR(8000)
SET @sql='' --初始化变量@sql
SELECT @sql=@sql+','+课程 FROM tb GROUP BY 课程 --变量多值赋值
SET @sql=stuff(@sql,1,1,'')--去掉首个','
SET @sql='select * from tb pivot (max(分数) for 课程 in ('+@sql+'))a'
exec(@sql)
--或使用isnull()
DECLARE @sql VARCHAR(8000)
SELECT @sql=isnull(@sql+',','')+课程 FROM tb GROUP BY 课程
SET @sql='select * from tb pivot (max(分数) for 课程 in ('+@sql+'))a'
exec(@sql)二 行转列
1、建立表格
IF OBJECT_ID('tb')IS NOT NULL DROP TABLE tb
go
CREATE TABLE tb(姓名 VARCHAR(10),语文 INT,数学 INT,物理 INT)
INSERT INTO tb VALUES('张三',74,83,93)
INSERT INTO tb VALUES('李四',74,84,94)
go
SELECT * FROM tb
go
2、使用SQL Server 2000静态SQL
--SQL SERVER 2000静态SQL。
SELECT * FROM
(
SELECT 姓名,课程='语文',分数=语文 FROM tb
UNION ALL
SELECT 姓名,课程='数学',分数=数学 FROM tb
UNION ALL
SELECT 姓名,课程='物理',分数=物理 FROM tb
) t
ORDER BY 姓名,CASE 课程 WHEN '语文' THEN 1 WHEN '数学' THEN 2 WHEN '物理' THEN 3 end
2、使用SQL Server 2000动态SQL
--SQL SERVER 2000动态SQL。
--调用系统表动态生态。
DECLARE @sql VARCHAR(8000)
SELECT @sql=isnull(@sql+' union all ','')+' select 姓名, [课程]='
+quotename(Name,'''')+' , [分数] = '+quotename(Name)+' from tb'
FROM syscolumns
WHERE Name!='姓名' AND ID=object_id('tb')--表名tb，不包含列名为姓名的其他列
ORDER BY colid
exec(@sql+' order by 姓名')
go3、使用SQL Server 2005静态SQL
--SQL SERVER 2005动态SQL
SELECT 姓名,课程,分数 FROM tb unpivot (分数 FOR 课程 IN([语文],[数学],[物理])) t4、使用SQL Server 2005动态SQL
--SQL SERVER 2005动态SQL
DECLARE @sql NVARCHAR(4000)
SELECT @sql=isnull(@sql+',','')+quotename(Name)
FROM syscolumns
WHERE ID=object_id('tb')AND Name NOT IN('姓名')
ORDER BY Colid
SET @sql='select 姓名,[课程],[分数] from tb unpivot ([分数] for [课程] in('+@sql+'))b'
exec(@sql)