SQL Condition based searching ,not working with AND condition

问题

I am implementing search operation (client side searching via stored procedure) i have a 'Nvarchar' type column 'ArticleHeader' and a 'DATE' column 'DateEffective' i am performing conditional based searching by passing @operator, for the fallowing snippet i am trying to search date and article header in Conjunction (AND) i am getting no results how ever if i run them individually they works out fine.

Find the snippet :

CREATE TABLE #TempItems
(
    DateEffective DATE,
    ArticleHeader NVARCHAR(50)
)

insert into #TempItems values ('2019-12-28','Nieuws')
insert into #TempItems values ('2020-02-12','Test')
insert into #TempItems values ('2020-01-10','zolo')
insert into #TempItems values ('2020-02-23','valued')

declare @DateEffective datetime,@operator nvarchar(10)
--set @DateEffective ='2020-01-10'
set @operator='neq'
declare @ArticleHeader nvarchar (50) ='Nieuws'

select * from #TempItems PA
Where 1=1
--------------------------------------------------------------------
And
(
(
(@operator='neq') And
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE convert(date,PA.DateEffective) 
END !=
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE Convert(Date, @DateEffective)
End
)
OR
(
(@operator='eq') And
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE convert(date,PA.DateEffective) 
END =
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE Convert(Date, @DateEffective)
End
)
)
----------------------------------------------------------------------
AND
(
(lower(@Operator) = 'eq' AND 
CASE WHEN @ArticleHeader IS NULL
            THEN '1'
            ELSE PA.ArticleHeader
      END =
      CASE WHEN @ArticleHeader IS NULL
                    THEN '1'
                    ELSE CONVERT(nvarchar(1000), @ArticleHeader)
      END
)
OR
(lower(@Operator) = 'startswith' AND 
CASE WHEN @ArticleHeader IS NULL
            THEN '1'
            ELSE PA.ArticleHeader
      END Like 
      CASE WHEN @ArticleHeader IS NULL
                    THEN '1'
                    ELSE CONVERT(nvarchar(1000), @ArticleHeader) + '%'
      END
)
)
---------------------------------------------------------------------------

回答1:

Hi @Azhar can you please check this query it's working fine in both cases.

DROP TABLE IF EXISTS #TempItems

CREATE TABLE #TempItems
(
    DateEffective DATE,
    ArticleHeader NVARCHAR(50)
)

insert into #TempItems values ('2019-12-28','Nieuws')
insert into #TempItems values ('2020-02-12','Test')
insert into #TempItems values ('2020-01-10','zolo')
insert into #TempItems values ('2020-02-23','valued')
insert into #TempItems values ('2020-02-24','Nieuws')

declare @DateEffective datetime,@operator nvarchar(10)
set @DateEffective ='2020-01-10'
set @operator='startswith'
declare @ArticleHeader nvarchar (50) ='Nieuws'

select * from #TempItems PA
Where 1=1
--------------------------------------------------------------------
And
(
(
(@operator='neq') And
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE convert(date,PA.DateEffective) 
END !=
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE Convert(Date, @DateEffective)
End
)
OR
(
(@operator='eq') And
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE convert(date,PA.DateEffective) 
END =
CASE WHEN @DateEffective IS NULL 
THEN '1900-1-1' 
ELSE Convert(Date, @DateEffective)
End
)
OR
(
    1=1
)
)
------------------------------------------------------------------------
AND
(
(lower(@Operator) = 'eq' AND 
CASE WHEN @ArticleHeader IS NULL
            THEN '1'
            ELSE PA.ArticleHeader
      END =
      CASE WHEN @ArticleHeader IS NULL
                    THEN '1'
                    ELSE CONVERT(nvarchar(1000), @ArticleHeader)
      END
)
OR
(lower(@Operator) = 'startswith' AND 
CASE WHEN @ArticleHeader IS NULL
            THEN '1'
            ELSE PA.ArticleHeader
      END Like 
      CASE WHEN @ArticleHeader IS NULL
                    THEN '1'
                    ELSE CONVERT(nvarchar(1000), @ArticleHeader) + '%'
      END
)
OR
(lower(@Operator) = 'neq' AND 
CASE WHEN @ArticleHeader IS NULL
            THEN '1'
            ELSE PA.ArticleHeader
      END <> 
      CASE WHEN @ArticleHeader IS NULL
                    THEN '1'
                    ELSE CONVERT(nvarchar(1000), @ArticleHeader) 
      END
)
)
---------------------------------------------------------------------------

Output

Startwith

来源：https://stackoverflow.com/questions/60359272/sql-condition-based-searching-not-working-with-and-condition

标签

sql

sql-server-2017