Question

我正在尝试一个SQL查询

alter procedure [dbo].[sp_E_GetProducts]
@skip as INT = 0,
@take as INT = 999999,
@search as NVARCHAR(50) = '',
@urtkod as NVARCHAR(50) = ''
as
begin
; with MyTable as ( 
select sto_kod, sto_isim, sto_sat_cari_kod, ROW_NUMBER() OVER (ORDER BY sto_kod) as row from MikroDB_V14_AKCAY2010.dbo.STOKLAR where
(sto_isim like '%' + @search + '%' or sto_kod like '%' + @search + '%') and sto_sat_cari_kod <> '' and  @urtkod like '%' + sto_sat_cari_kod + '%'

)

select * from MyTable where row between @skip and @take
end

当我把参数设置为空时它工作但是当@urtkod为null时我想要所有表（它意味着“和sto_sat_cari_kod＆lt;＆gt;''和@urtkod像'％'+ sto_sat_cari_kod +'％'”将忽略），我研究“案件何时”，但它不起作用或我做错了。

Answer 1

alter procedure [dbo].[sp_E_GetProducts]
@skip as INT = 0,
@take as INT = 999999,
@search as NVARCHAR(50) = '',
@urtkod as NVARCHAR(50) = ''
as
begin
    If (@urtkod is null)
    Begin
        ; with MyTable as ( 
        select sto_kod, sto_isim, sto_sat_cari_kod, ROW_NUMBER() OVER (ORDER BY sto_kod) as row from MikroDB_V14_AKCAY2010.dbo.STOKLAR where
        (sto_isim like '%' + @search + '%' or sto_kod like '%' + @search + '%') and sto_sat_cari_kod <> '' and  @urtkod like '%' + sto_sat_cari_kod + '%'

        )
    End
    Else
    Begin
        ; with MyTable as ( 
        select sto_kod, sto_isim, sto_sat_cari_kod, ROW_NUMBER() OVER (ORDER BY sto_kod) as row from MikroDB_V14_AKCAY2010.dbo.STOKLAR where
        (sto_isim like '%' + @search + '%' or sto_kod like '%' + @search + '%') and sto_sat_cari_kod <> '' --and  @urtkod like '%' + sto_sat_cari_kod + '%'

        )
    End
select * from MyTable where row between @skip and @take
end

您也可以查看'' ....

Answer 2

更改以下部分

and  @urtkod like '%' + sto_sat_cari_kod + '%'

到

and     (@urtkod like '%' + sto_sat_cari_kod + '%' OR @urtkod IS NULL)

使用SQL SERVER和ISNULL

您可以将其更改为

and     (ISNULL(@urtkod,'') like '%' + sto_sat_cari_kod + '%')

对于RDBMS之间的不同版本，也可以查看SQL NULL Functions

参数为null时的SQL然后获取全部

2 个答案: