2012-08-05 77 views
2

我有很多列的表格,我想添加到每個列相同的前綴在做選擇的時候,我的意思是不是長碼:選擇以所有表

SELECT table.id AS prefix_id 
     ,table.value AS prefix_value 
     ,table.content AS prefix_content 
     , ... 

有一個簡單如何做到這一點?

+2

其中rdbms?動態sql可能是一個選項(即Oracle世界中的EXECUTE IMMEDIATE)。 – Glenn 2012-08-05 21:01:54

+0

你使用什麼數據庫? – hol 2012-08-05 21:37:32

+0

在不知道數據庫的情況下,大多數人都可以說是使用動態SQL遍歷列來構建所需的別名。 – 2012-08-05 22:10:10

回答

2

不可能爲所有列添加前綴,除非您使用AS(如您的示例)手動執行。

0

我不知道這是否會幫助你,寫一個腳本來做到這一點。您可以自定義它傳遞表名,前綴等

declare 
@tableName varchar(50) = 'school', 
@sql varchar(max) = 'SELECT ' 

Select @sql = @sql+'c.'+c.name+',' from sys.columns c 
join sys.tables t on c.object_id = t.object_id 
where t.name = @tableName 

--MORE PRECISELY 
Select @sql = @sql+'c.'+c.name+' as prefix_'+c.name+', ' from sys.columns c 
join sys.tables t on c.object_id = t.object_id 
where t.name = @tableName 

Set @sql = @sql + ' FROM '[email protected]+' c' 

print @sql 

輸出,其中c.是前綴。您可以修改代碼以品嚐

SELECT c.SchoolID as prefix_SchoolID, 

    c.SchoolName as prefix_SchoolName, 
    c.Address as prefix_Address, 
    c.City as prefix_City, 
    c.State as prefix_State, 
    c.Country as prefix_Country, 
    c.PhoneNumber as prefix_PhoneNumber, 
    c.Password as prefix_Password, 
    c.CreatedBy as prefix_CreatedBy, 
    c.CreatedOn as prefix_CreatedOn, 
    c.ModifiedBy as prefix_ModifiedBy, 
    c.ModifiedOn as prefix_ModifiedOn, 

FROM school c 

注意逗號modifiedOn後。您可能需要從@sql變量或手動刪除