我想做一个有两个选择的联盟，并放在一个表

Question

我有这个代码到目前为止，我想让他们联合到一个问题，但我不能得到它的工作。我一直试图做一个新的选择周围转换和一切下来作为Nvarchar。

DECLARE @tableHTML NVARCHAR(MAX); 
SET @tableHTML = 
N'<H3>Felaktiga rader</H3>'+ 
N'<table border="1">'+ 
N'<tr><th>ID</th>'+ 
N'<th>Value</th>'+ 
N'<th>Reason</th>'+ 

CAST ((SELECT td=ID,'', 
td = Value,'', 
td = Reason,'' 

FROM Mail.dbo.CheckMe 
WHERE Value = '120' OR Value = '220' 
UNION 
Mail.dbo.CheckMeTwo 
WHERE Value = '120' OR Value = '220' 

for XML path ('tr'), TYPE 
) as NVARCHAR(MAX))+ 
N'</table>'; 

EXEC msdb.dbo.sp_send_dbmail 
@recipients = 'ZZXXYY@gmail.com;', 
@subject = ' Felaktiga Rader', 
@body = @tableHTML, 
@body_format = 'HTML'; 

Answer 1

我这样解决了。

FROM (SELECT * FROM Mail.dbo.CheckMe 
WHERE Value = '120' OR Value = '220' 
UNION 
SELECT * FROM Mail.dbo.CheckMeTwo 
WHERE Value = '120' OR Value = '220') T 

Answer 2

忘记了选择在第二个查询中的列!!!!

SELECT td=ID,'',td = Value,'', td = Reason,'' 
FROM Mail.dbo.CheckMe 
WHERE Value = '120' OR Value = '220' 
UNION 
SELECT td=ID,'',td = Value,'', td = Reason,'' 
FROM Mail.dbo.CheckMeTwo 
WHERE Value = '120' OR Value = '220' 

您需要在您的UNION结构中为每个查询选择一个列表！