Question

我有一种情况，如果我使用一个函数，我可以在查询中保存大量重复的文本，但是在这个网站上我没有权利在服务器上创建一个函数。

有没有办法在查询正文中定义一个函数，然后从查询本身调用它？

希望我正确发布以下精简代码。真正的查询调用两个函数，按年计算，按年计算收入。

-- Function 
alter function PetRockCountByYear 
     (@Company varchar(50), @DateFrom varchar(20), @DateTo varchar(20))
RETURNS varchar(50)  
AS
begin
    return (select isnull( SUM( transact.qty ), 0) 
            from TRANSACT 
            inner join CATALOG on transact.ITEM_NO = catalog.ITEM_NO
            where transact.TRAN_DATE >= @DateFrom 
              and transact.TRAN_DATE <= @DateTo  
              and transact.ITEM_NO = 'PetRock'
              and @Company = transact.company 
              and transact.ITEM_NO = catalog.ITEM_NO)  
end

-- Simplified Query Below
select distinct 
    company.account, company.COMPANY,
    company.STATUS, company.code,
    -- Report counts from 1970 - 2015
    (select dbo.PetRockCountByYear(company.COMPANY, '01/01/1970', '12/31/1970') ) as '#1970',
    (select dbo.PetRockCountByYear( company.COMPANY , '01/01/1971', '12/31/1971') ) as '#1971'
from 
    TRANSACT 
Inner join 
    invoices on transact.inv_no = invoices.inv_no
Inner join 
    COMPANY on invoices.COMPANY = company.company
where 
    ITEM_NO = 'PetRock' 
order by 
    company.ACCOUNT

Answer 1

SQL-Server T-SQL中没有临时函数，您需要拥有CREATE FUNCTION数据库权限：https://msdn.microsoft.com/en-us/library/ms178569.aspx#Anchor_2和https://msdn.microsoft.com/en-us/library/ms191320.aspx#Anchor_0

SQL Server函数类似于查询中的行为而不创建函数？

1 个答案: