【发布时间】：2017-04-27 18:35:13
【问题描述】：
我正在研究一个存储过程，它有两个输入参数，我需要使用 COLLATE SQL_Latin1_General_CP1_CI_AS 以便查询不区分大小写的结果；但是，我还想允许使用输入显示全部选项。我还没有找到一种方法让 Collate 在案例陈述中工作。注意：作为一种变通方法，我将使用 4 种不同的 If 语句来编写代码，用于选择值和/或全部显示的不同场景，但如果可能的话，我想要更简洁的东西。当前代码如下
Declare
@INCo as bCompany,
@MatBeg as bMatl,
@MatEnd as bMatl,
@Catg as bGroup,
@Model as VarChar(20),
@PatternM as VarChar(20),
@SellOn as VarChar(20),
@PatternS as VarChar(20),
@ShowZero as bYN
set @INCo = '1'
set @MatBeg = '0'
set @MatEnd = 'ZZZZZZZZZZ'
set @Catg = '0'
set @Model = '637'
set @SellOn = 'EBAY'
set @ShowZero = 'Y'
begin
set @PatternM = '%' + @Model + '%';
set @PatternS = '%' + @SellOn + '%';
select i.INCo, i.Material, h.Description, h.Category, c.Description as CatgDesc, i.Booked as Quantity, i.PhyLoc, p.Storage,
i.udModelFit as FitsModel, i.udSellPriceNew as LikeNewSellPrice, i.udSellPriceUsed as UsedSellPrice, i.udSellingOn as SellingOn
from INMT i
left outer join HQMT h on i.MatlGroup=h.MatlGroup and i.Material=h.Material
left outer join HQMC c on h.MatlGroup=c.MatlGroup and h.Category=c.Category
left outer join udPhysicalloc p on i.PhyLoc=p.Physicalloc
where i.INCo = (CASE when @INCo <> 0 then @INCo else i.INCo END)
and i.Material >= @MatBeg and i.Material <= @MatEnd
and c.Category = (CASE when @Catg <> 0 then @Catg else c.Category END)
and i.udModelFit COLLATE SQL_Latin1_General_CP1_CI_AS like @PatternM
and i.udSellingOn COLLATE SQL_Latin1_General_CP1_CI_AS like @PatternS
and i.Booked >= (CASE when @ShowZero = 'N' then 1 else 0 END)
END
如果我只关心@Model 和@SellOn 的不区分大小写的结果，则此代码非常有效。但是，就像我拥有的其他参数一样，我想包含一些允许显示该参数的所有结果的东西。比如：
i.udModelFit = (CASE when @Model <> 'ALL' then COLLATE SQL_Latin1_General_CP1_CI_AS like @PatternM else i.udModelFit END)
例如，我想输入 @Model = 'ALL' 和 @SellOn = 'eBay' 并且结果将是任何具有 Sell On = EBAY 的模型（不区分大小写）
更新：我能够将 Where 修改为以下内容，现在我得到了想要的结果。
where i.INCo = (CASE when @INCo <> 0 then @INCo else i.INCo END)
and i.Material >= @MatBeg and i.Material <= @MatEnd
and c.Category = (CASE when @Catg <> 0 then @Catg else c.Category END)
and (
(@Model IS NULL or i.udModelFit COLLATE SQL_Latin1_General_CP1_CI_AS like @PatternM)
or ((i.udModelFit like '%' or i.udModelFit IS NULL) and @Model = 'ALL')
)
and (
(@SellOn IS NULL or i.udSellingOn COLLATE SQL_Latin1_General_CP1_CI_AS like @PatternS)
or ((i.udSellingOn like '%' or i.udSellingOn IS NULL) and @SellOn = 'ALL')
)
and i.Booked >= (CASE when @ShowZero = 'N' then 1 else 0 END)
【问题讨论】：
标签： sql-server-2008 stored-procedures case case-sensitive collate