如何在SQL Server中选择特定的列名

Question

这是我先前有关如何在SQL Server中迭代字符串的问题：

现在如何特别选择列名称？ 这是我选择列的代码：

SELECT 'Field '+CAST(ROW_NUMBER() OVER (ORDER BY ordinal_position) AS varchar(5))+': ' + 
COLUMN_NAME
FROM information_schema.columns 
WHERE table_Name = 'SystemDefined' and table_schema = 'schemaAsset'

这是输出：

Field 1: Asset_No
Field 2: AssetCategory
Field 3: AssetClassification
Field 4: PurchaseType
Field 5: Department
Field 6: RespPerson
Field 7: Status
Field 8: Location

选择特定的列名称时，这是我想要的输出：

Field 1: Asset_No
Field 2: AssetCategory
Field 3: AssetClassification
Field 4: PurchaseType
Field 5: Department
Field 6: RespPerson
Field 7: Status

Answer 1

如何使用可以在WHERE子句上使用的NOT IN来指定其他条件。

SELECT...
FROM..
WHERE  table_Name = 'SystemDefined' AND 
       table_schema = 'schemaAsset' AND
       COLUMN_NAME NOT IN ('Status',....) --  specify the list of names you
                                          -- don't want to show

Answer 2

除非我丢失了某些内容，否则您可以使用WHERE子句排除不想要的列：

SELECT 'Field '
  + CAST(ROW_NUMBER() OVER (ORDER BY ordinal_position) AS varchar(5))+': ' 
  + COLUMN_NAME
FROM information_schema.columns 
WHERE table_Name = 'SystemDefined' 
  and table_schema = 'schemaAsset'
  and COLUMN_NAME <> 'Location'

如果您有多列，则可以使用NOT IN ('Location', 'etc')

Answer 3

推荐sys.columns而不是INFORMATION_SCHEMA （ 这就是原因 ）。

SELECT 'Column ' 
  + CONVERT(VARCHAR(5), ROW_NUMBER() OVER (ORDER BY column_id))
  + ': ' + name
FROM sys.columns
WHERE [object_id] = OBJECT_ID(N'schemaAsset.SystemDefined')
AND name NOT IN ('Location' /* , ... other columns ... */)
ORDER BY column_id; -- because you never know how SQL Server might order