Question

我有一个名为service entry的表，我试图创建一个连接字符串。

ID  ServiceEntryID  PartID  Comment  ServiceTypeIDs  PartDescription
1        2           54      xyz      1               hellothere
2        2           22                               howdy
3        33          54      uhu      1               xyz

所需的字符串格式

PARTID〜PartDescription〜ServiceTypeIDs〜注释

所需字符串值

所以对于值为2的服务条目ID列：

54~hellothere~1~xyz | 22~ howdy~null~ |

表示值为33的服务条目ID列：

33~xyz~1~uhu

如果条目没有注释，那么我不为它添加null，而如果servicetypeids为空，那么我将添加null

Answer 1

SELECT
     ServiceEntryID,
     STUFF(
         (SELECT '|' + CAST(PartID AS VARCHAR(5)) + '~' +
                       PartDescription  + '~' +
                       COALESCE(CAST(ServiceTypeIDs AS VARCHAR(5)), 'NULL')  + '~' +
                       COALESCE(Comment, 'NULL')
          FROM TableName
          WHERE ServiceEntryID = a.ServiceEntryID
          FOR XML PATH (''))
          , 1, 1, '')  AS ResultList
FROM TableName AS a
WHERE ServiceEntryID = 2
GROUP BY ServiceEntryID

Answer 2

Select   coalesce(partID,'NULL') +'~'+ 
coalesce(PartDescription,'NULL') +'~'+ 
 coalesce(ServiceTypeIDs,'NULL') +'~'+
 coalesce(Comment,'NULL') as DesiredStringFormat
FROM yourTableName

当任何字段为NULL时，上面将替换“NULL”一词。

http://msdn.microsoft.com/en-us/library/ms190349.aspx

SQL创建连接字符串

2 个答案: