mysql - 如何在 sql server 的行中显示 sql 标题列

Question

我想按列显示特定月份和年份的这些记录，如下表格式

Source   Total
Organic  1252   
Paid     121             
Email  Campaign 121    
Total   1494    

select Organic,Paid ,EmailCampaign ,Total    from tbl_leads where Month='Aug' and  Year='2015'     

下面是样本日期

Organic Paid    EmailCampaign   Total   ProjectName        Month    Year
4444    5555        2222       1111      demo project       Feb   2015
1252    121          121       1494      debug test         Aug   2015

Answer 1

在 Sql Server 中，您可以使用 Cross Apply 和 Tabled Valued Constructor 来反透视数据

SELECT cs.Source,
       cs.Total
FROM   tbl_leads
       CROSS apply (VALUES ('Organic',Organic),
                           ('Paid',Paid),
                           ('EmailCampaign',EmailCampaign),
                           ('Total',Total)) cs(Source, Total)
WHERE  Month = 'Aug'
       AND Year = '2015' 

或者Generic Sql解决方案

SELECT 'Organic' AS Source,
       Organic   AS Total
FROM   tbl_leads
UNION ALL
SELECT 'Paid',
       Paid
FROM   tbl_leads
UNION ALL
SELECT 'EmailCampaign',
       EmailCampaign
FROM   tbl_leads
UNION ALL
SELECT 'Total',
       Total
FROM   tbl_leads