各位高手,我写的这个存取过程是用于查询的,此类过程一直没有找到好的解决方法,我只能是自己
根据参数组合成语句后执行,有没有办法能就执行一个查询得到数据集?参数可以任意组合的,都有可能为nullCREATE PROCEDURE Search
@RegionId NVarchar(10),
@FunctionId NVarchar(10),
@CorporationNatureId int,
@IssueDay int,
@Keywords NVarchar(20),
@OfficeNameOrCorporationName int,
@Include int,
@TotalCount INT OUTPUT,--数据总数
@PageIndex INT=1,
@PageSize INT=20
AS
declare @FromDate DateTime
declare @fieldname varchar(20)
declare @where NVarchar(4000)
declare @sql NVarchar(4000)select @fieldname=case @OfficeNameOrCorporationName
when 1 then 'CorporationName'
when 0 then 'OfficeName'
else ''
end if not( @IssueDay is null)
select @fromdate = dateadd(day,0-@IssueDay,getdate())select @where=''
select @sql='Select Row_Number() Over(Order By CorporationId Desc,OfficeName ) as RowNumber,OfficeId,OfficeName,CorporationId,CorporationName,DepartmentName,PersonCounts,IssueDate,EndDate from V_Offices ' if not(@CorporationNatureId is null)
select @where='CorporationNatureId = '+Convert(NVarchar(10),@CorporationNatureId)if(not @FunctionId is null)
begin
if (@where='')
select @where=' FunctionId like '+''''+@FunctionId+'%' +''''
else
select @where=@where+' and FunctionId like '+''''+@FunctionId+'%'+''''
endif(not @IssueDay is null)
begin
if(@where='')
select @where=' IssueDate>='+''''+Convert(NVarchar(20),@fromdate)+''''
else
select @where=@where+' and IssueDate>='+''''+Convert(NVarchar(20),@fromdate)+''''
endif not(@Keywords is null)
begin
if(@where='')
select @where=@fieldname+' like ' +''''+'%'+@Keywords+'%'+''''
else
select @where=@where+' and '+@fieldname+' like ' +''''+'%'+@Keywords+'%'+''''
endif(not @RegionId is null)
begin
if(@where='')
begin
if(@include=0)
select @where=' RegionId = '+''''+@RegionId+''''
else
select @where=' RegionId like '+''''+@RegionId+'%'+''''
end
else
begin
if(@include=0)
select @where=@where+' and RegionId = '+''''+@RegionId+''''
else
select @where=@where+' and RegionId like '+''''+@RegionId+'%'+''''
end
endif(@where<>'')
select @sql=@sql+' where '+@where
execute(@sql)select @totalcount=count(*) from v_offices where @where
根据参数组合成语句后执行,有没有办法能就执行一个查询得到数据集?参数可以任意组合的,都有可能为nullCREATE PROCEDURE Search
@RegionId NVarchar(10),
@FunctionId NVarchar(10),
@CorporationNatureId int,
@IssueDay int,
@Keywords NVarchar(20),
@OfficeNameOrCorporationName int,
@Include int,
@TotalCount INT OUTPUT,--数据总数
@PageIndex INT=1,
@PageSize INT=20
AS
declare @FromDate DateTime
declare @fieldname varchar(20)
declare @where NVarchar(4000)
declare @sql NVarchar(4000)select @fieldname=case @OfficeNameOrCorporationName
when 1 then 'CorporationName'
when 0 then 'OfficeName'
else ''
end if not( @IssueDay is null)
select @fromdate = dateadd(day,0-@IssueDay,getdate())select @where=''
select @sql='Select Row_Number() Over(Order By CorporationId Desc,OfficeName ) as RowNumber,OfficeId,OfficeName,CorporationId,CorporationName,DepartmentName,PersonCounts,IssueDate,EndDate from V_Offices ' if not(@CorporationNatureId is null)
select @where='CorporationNatureId = '+Convert(NVarchar(10),@CorporationNatureId)if(not @FunctionId is null)
begin
if (@where='')
select @where=' FunctionId like '+''''+@FunctionId+'%' +''''
else
select @where=@where+' and FunctionId like '+''''+@FunctionId+'%'+''''
endif(not @IssueDay is null)
begin
if(@where='')
select @where=' IssueDate>='+''''+Convert(NVarchar(20),@fromdate)+''''
else
select @where=@where+' and IssueDate>='+''''+Convert(NVarchar(20),@fromdate)+''''
endif not(@Keywords is null)
begin
if(@where='')
select @where=@fieldname+' like ' +''''+'%'+@Keywords+'%'+''''
else
select @where=@where+' and '+@fieldname+' like ' +''''+'%'+@Keywords+'%'+''''
endif(not @RegionId is null)
begin
if(@where='')
begin
if(@include=0)
select @where=' RegionId = '+''''+@RegionId+''''
else
select @where=' RegionId like '+''''+@RegionId+'%'+''''
end
else
begin
if(@include=0)
select @where=@where+' and RegionId = '+''''+@RegionId+''''
else
select @where=@where+' and RegionId like '+''''+@RegionId+'%'+''''
end
endif(@where<>'')
select @sql=@sql+' where '+@where
execute(@sql)select @totalcount=count(*) from v_offices where @where
set @s=@s + ' and 字段=' + 条件1if 条件2不为空 then
set @s=@s + ' and 字段=' + 条件2
...
exec (@s)
--------------------------------------------------------------------------------动态sql语句基本语法
1 :普通SQL语句可以用Exec执行 eg: Select * from tableName
Exec('select * from tableName')
Exec sp_executesql N'select * from tableName' -- 请注意字符串前一定要加N 2:字段名,表名,数据库名之类作为变量时,必须用动态SQL eg:
declare @fname varchar(20)
set @fname = 'FiledName'
Select @fname from tableName -- 错误,不会提示错误,但结果为固定值FiledName,并非所要。
Exec('select ' + @fname + ' from tableName') -- 请注意 加号前后的 单引号的边上加空格 当然将字符串改成变量的形式也可
declare @fname varchar(20)
set @fname = 'FiledName' --设置字段名 declare @s varchar(1000)
set @s = 'select ' + @fname + ' from tableName'
Exec(@s) -- 成功
exec sp_executesql @s -- 此句会报错 declare @s Nvarchar(1000) -- 注意此处改为nvarchar(1000)
set @s = 'select ' + @fname + ' from tableName'
Exec(@s) -- 成功
exec sp_executesql @s -- 此句正确 3. 输出参数
declare @num int,
@sqls nvarchar(4000)
set @sqls='select count(*) from tableName'
exec(@sqls)
--如何将exec执行结果放入变量中? declare @num int,
@sqls nvarchar(4000)
set @sqls='select @a=count(*) from tableName '
exec sp_executesql @sqls,N'@a int output',@num output
select @num