Question

我有一个包含许多列的表，我想在执行select时向每列添加相同的前缀，我的意思是代替长代码：

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

有一种简单的方法可以做到吗？

Answer 1

除非您使用AS手动执行此操作，否则无法为所有列添加前缀（如示例所示）。

Answer 2

我不知道这是否会对你有帮助，写一个脚本来做到这一点。您可以自定义它以传递表名，前缀等

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 '+@tableName+' c'

print @sql

输出，其中c.是前缀。您可以修改代码以尝试

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modifiedOn之后的逗号。您可能需要从@sql变量或manaually

中删除它

SELECT AS到所有表

2 个答案: