TSQL - 設置多個變量的有效方式

Question

是他們更有效的方式嗎？

set @ShippingL = (select ShippingL from AuctionProducts where ProductID = @ProductID) 
set @ShippingB = (select ShippingB from AuctionProducts where ProductID = @ProductID) 
set @ShippingH = (select ShippingH from AuctionProducts where ProductID = @ProductID) 
set @ShippingW = (select ShippingW from AuctionProducts where ProductID = @ProductID) 

乾杯， -R

Answer 1

，我覺得做一個查詢是一樣好，你會得到它：

select 
    @ShippingL = ShippingL, 
    @ShippingB = ShippingB, 
    @ShippingH = ShippingH, 
    @ShippingW = ShippingW 
from 
    AuctionProducts 
where 
    ProductID = @ProductID 

我會想象這是比快4倍您發佈的代碼。另外，請確保您在AuctionProducts表的ProductID列上定義了一個索引。