Sql 动态筛选表错误子查询返回的值超过1
我有一个过滤器在我的网站搜索。所以我需要得到一家公司的品牌名称,该公司在一年内有一个产品 我想输入一个以上的年份值或空值 我使用拆分函数返回年份表Sql 动态筛选表错误子查询返回的值超过1,sql,sql-server,function,return-value,Sql,Sql Server,Function,Return Value,我有一个过滤器在我的网站搜索。所以我需要得到一家公司的品牌名称,该公司在一年内有一个产品 我想输入一个以上的年份值或空值 我使用拆分函数返回年份表 declare @test nvarchar(50) = '1991,1997' select BrandName from Item where DisplayPrice =1 and YearMan in (CASE WHEN @test is not null THEN (select * from split(@test,',')) E
declare @test nvarchar(50) = '1991,1997'
select BrandName from Item where DisplayPrice =1
and YearMan in (CASE WHEN @test is not null THEN (select * from split(@test,',')) ELSE YearMan END)
分裂函数
ALTER FUNCTION [dbo].[Split](
@sInputList VARCHAR(8000) -- List of delimited items
, @sDelimiter VARCHAR(8000) = ',' -- delimiter that separates items
) RETURNS @List TABLE (item VARCHAR(8000))
BEGIN
DECLARE @sItem VARCHAR(8000)
WHILE CHARINDEX(@sDelimiter,@sInputList,0) <> 0
BEGIN
SELECT
@sItem=RTRIM(LTRIM(SUBSTRING(@sInputList,1,CHARINDEX(@sDelimiter,@sInputList,0)-1))),
@sInputList=RTRIM(LTRIM(SUBSTRING(@sInputList,CHARINDEX(@sDelimiter,@sInputList,0)+LEN(@sDelimiter),LEN(@sInputList))))
IF LEN(@sItem) > 0
INSERT INTO @List SELECT @sItem
END
IF LEN(@sInputList) > 0
INSERT INTO @List SELECT @sInputList -- Put the last item in
RETURN
ALTER函数[dbo].[Split](
@sInputList VARCHAR(8000)——分隔项列表
,@sDelimiter VARCHAR(8000)=',--分隔项的分隔符
)返回@List表(项VARCHAR(8000))
开始
声明@sItem VARCHAR(8000)
而CHARINDEX(@sDelimiter,@sInputList,0)0
开始
挑选
@sItem=RTRIM(LTRIM(子字符串(@sInputList,1,CHARINDEX(@sDelimiter,@sInputList,0)-1)),
@sInputList=RTRIM(LTRIM(子字符串(@sInputList,CHARINDEX(@sDelimiter,@sInputList,0)+LEN(@sDelimiter),LEN(@sInputList)))
如果LEN(@sItem)>0
插入@List选择@sItem
结束
如果LEN(@sInputList)>0
插入@List选择@sInputList——将最后一项放入
返回
结束您可以这样重写它:
select BrandName
from Item
where DisplayPrice =1
and (@test IS NULL OR YearMan in (select item from split(@test,','))
declare @test nvarchar(50) = '1991,1997'
select BrandName
from Item
where DisplayPrice =1
and @test is not null
and YearMan in (select * from dbo.split(@test,','))
union all
select BrandName
from Item
where DisplayPrice =1
and @test is null
-- or
declare @test nvarchar(50) = '1991,1997'
declare @array table (yyyy smallint primary key);
insert @array (yyyy)
select * from dbo.split(@test,',');
select BrandName
from Item
where DisplayPrice =1
and @test is not null
and YearMan in (select yyyy from @array)
union all
select BrandName
from Item
where DisplayPrice =1
and @test is null