要仅选择一列，您只需在查询中指定列名称

  SELECT  ColumnName 
 FROM  TableName 

如果你问别的话，请在你的问题中提供更多信息。

How to do the connectivity to show only one column values from sql server

To select only one column you just need to specify the column name in the query

SELECT ColumnName
FROM TableName

If you''re asking something else then please give more information in your question.