Sql server 2008 如何编写这个Join语句？

在Sql中，我使用join从多个表中选择数据。我希望选择具有多个条件的位置，因此我使用and，or。 这里我需要如果jobCode=1，然后选择jobCode为1的所有数据，如果jobCode为2，则显示jobCode为2的所有数据。但是错误是 当我把JobCode=1时，它会将所有数据、2个相同的数据、0个相同的数据相加。我犯错误的地方。帮帮我

USE [Recruitment]
GO
/****** Object:  StoredProcedure [dbo].[sp_AdvanceSearch]    Script Date: 05/11/2011 09:47:43 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[sp_AdvanceSearch]

@callval int=9,
@JobCode int=0,
@location_id int=0,
@Position varchar(20)='',
@flag char(1)='',
@JobDesc varchar(MAX)='',
@PostStreamId varchar(10)='',
@GraduQuali varchar(100)='',
@Ten2StreamId varchar(10)='',
@StreamId varchar(10)='',
@ReqExp varchar(15)='',
@Salary varchar(25)='',
@JobLocation varchar(15)='',
@PostDate datetime='',
@EndDate datetime='',
@c_f_name varchar(15)='',
@c_m_name varchar(15)='',
@c_l_name varchar(15)='',
@email varchar(30)='',
@personal_id int=0,
@academic_id int=0,
@family_id int=0,
@profess_id int=0,
@applyId int=0,
@dtInterview int=0,
@TimeReq int=0,
@ExpSalary decimal(12,2)=0,
@EpSalary decimal(12,2)=50000000,
@Resume varchar(max)='',
@howdid int=0,
@dob datetime='1/1/1900',
@do datetime='1/1/2050',
@applydate datetime='',
@prof_qual varchar(10)='',
@prof_stream varchar(50)='0',
@prof_stream1 varchar(24)='',
@prof_stream2 varchar(24)='',
@prof_stream3 varchar(24)='',
@prof_year char(4)='2050',
@grad_qual varchar(10)='Bsc',
@grad_stream varchar(15)='0',
@grad_stream1  varchar(15)='',
@grad_stream2  varchar(15)='',
@grad_stream3  varchar(15)='',
@grad_year char(4)='2050',
@prof_year1  char(4)='0',
@grad_year1 char(4)='0',
@assignment1 int=0,
@assignment2 int=0,
@assignment3 int=0,
@assignment4 int=0,
@assignment5 int=0,
@ass1 int=6,
@ass2 int=6,
@ass3 int=6,
@ass4 int=6,
@ass5 int=6,
@ex_yyyy int=0,
@e_yyyy int=100,
@em_gross decimal(12,2)=50000000,
@emp_gross decimal(12,2)=0,
@city_id int=0,
@city_name varchar(15)=''

as
begin

if @callval=9
begin
declare @proce varchar(5000)

set @proce ='select rp_tbl_personal_details.c_f_name  +''''+c_m_name +''''+ c_l_name as name,
rp_tbl_personal_details.dob,rp_tbl_personal_details.email,
rp_tbl_academic_details.prof_qual,rp_tbl_academic_details.grad_qual,
rp_tbl_academic_details.prof_stream,rp_tbl_academic_details.prof_year,
rp_tbl_academic_details.grad_stream,rp_tbl_academic_details.grad_year,
rp_tbl_professional.ex_yyyy,
rp_tbl_family.assignment1,rp_tbl_family.assignment2,rp_tbl_family.assignment3,
rp_tbl_family.assignment4,rp_tbl_family.assignment5,
rp_tbl_professional.emp_gross,rp_tbl_CreateNewJob.JobCode,rp_tbl_CreateNewJob.Position,
rp_tbl_ApplyforJob.personal_id,rp_tbl_ApplyforJob.TimeReq,rp_tbl_ApplyforJob.ExpSalary,
dtInterview = case rp_tbl_ApplyforJob.dtInterview
when 1 then ''Any Day''
when 2 then ''Week Day''
when 3 then ''Weekends''
else ''Other''
end
from rp_tbl_CreateNewJob
inner join rp_tbl_ApplyforJob on
rp_tbl_CreateNewJob.JobCode=rp_tbl_ApplyforJob.JobCode
inner join rp_tbl_personal_details on
rp_tbl_ApplyforJob.personal_id=rp_tbl_personal_details.personal_id
inner join rp_tbl_academic_details on
rp_tbl_personal_details.personal_id=rp_tbl_academic_details.personal_id
inner join rp_tbl_family on
rp_tbl_academic_details.academic_id=rp_tbl_family.academic_id
inner join rp_tbl_professional on
rp_tbl_family.family_id=rp_tbl_professional.family_id where 1=1 and rp_tbl_CreateNewJob.JobCode =' + convert (varchar(50),@JobCode)+  '  and  rp_tbl_personal_details.dob BETWEEN ' + ''''+ convert(varchar(50),@dob) + ''''+'  and  ' +''''+ convert(varchar(50),@do)+''''
if (@prof_qual!='')
begin
set @proce =@proce + ' and rp_tbl_academic_details.prof_qual in ('+'''' + convert (varchar (50),@prof_qual)+''')'
end
if (@prof_stream!='0')
begin
set @proce =@proce + ' and rp_tbl_academic_details.prof_stream in (' + @prof_stream +')'
end
set @proce =@proce + ' and rp_tbl_academic_details.prof_year BETWEEN ' + ''''+ convert(varchar(50),@prof_year1 ) + '''' + '  And ' + '''' + convert(varchar(50),@prof_year )+ ''''  
if (@grad_qual!='')
begin
set @proce =@proce + ' and rp_tbl_academic_details.grad_qual in (''' + @grad_qual +''')'
end
if (@grad_stream!='0')
begin
set @proce =@proce + ' and rp_tbl_academic_details.grad_stream in (' + @grad_stream +')'
end
set @proce =@proce + ' or rp_tbl_academic_details.grad_year BETWEEN ' + ''''+ convert(varchar(50),@grad_year1 ) + '''' + '  And ' + '''' + convert(varchar(50),@grad_year )+ ''''  
if (@assignment1 != 0)
begin
set @proce =@proce + ' or rp_tbl_family.assignment1 = ' + convert(varchar(50),@assignment1 )
end
if (@assignment2 != 0)
begin
set @proce =@proce + ' or rp_tbl_family.assignment2 = ' + convert(varchar(50),@assignment2 )
end
if (@assignment3 != 0)
begin
set @proce =@proce + ' or rp_tbl_family.assignment3 = ' + convert(varchar(50),@assignment3 )
end
if (@assignment4 != 0)
begin
set @proce =@proce + ' or rp_tbl_family.assignment4 = ' + convert(varchar(50),@assignment4 )
end
if (@assignment5 != 0)
begin
set @proce =@proce + ' or rp_tbl_family.assignment5 = ' + convert(varchar(50),@assignment5 )
end
if (@ex_yyyy !=0 and @e_yyyy!=100)
begin
set @proce =@proce + ' and rp_tbl_professional.ex_yyyy BETWEEN ' + ''''+ convert(varchar(50),@ex_yyyy ) + '''' + '  And ' + '''' + convert(varchar(50),@e_yyyy )+ ''''  
end
if (@emp_gross !=0 and @em_gross!=50000000)
begin
set @proce =@proce + ' or rp_tbl_professional.emp_gross BETWEEN ' + ''''+ convert(varchar(50),@emp_gross ) + '''' + '  And ' + '''' + convert(varchar(50),@em_gross )+ ''''  
end
if (@ExpSalary !=0 and @EpSalary !=50000000)
begin
set @proce =@proce + ' or rp_tbl_ApplyforJob.ExpSalary BETWEEN ' + ''''+ convert(varchar(50),@ExpSalary ) + '''' + '  And ' + '''' + convert(varchar(50),@EpSalary )+ ''''  
end
print (@proce)
exec(@proce)
end
end

---

实际上，我通过获取输出查询来测试代码，这就是我得到的结果。我省略了where语句之前的其他语句，并为您的表创建了一个别名

WHERE 1=1
    AND cnj.JobCode =0
    AND pd.dob BETWEEN 'Jan  1 1900 12:00AM' AND 'Jan  1 2050 12:00AM' 
    AND ad.prof_qual IN ('') 
    AND ad.prof_stream IN (0) 
    AND ad.prof_year BETWEEN '0   '  AND '2050' 
    AND ad.grad_qual IN ('Bsc') 
    AND ad.grad_stream IN (0) 
    OR ad.grad_year BETWEEN '0   '  AND '2050' 
    OR fa.assignment1 = 0 
    OR fa.assignment2 = 0 
    OR fa.assignment3 = 0 
    OR fa.assignment4 = 0 
    OR fa.assignment5 = 0 
    AND pr.ex_yyyy BETWEEN '0'  AND '100' 
    OR pr.emp_gross BETWEEN '0'  AND '50000000' 
    OR apr.ExpSalary BETWEEN '0'  AND '50000000'

根据我的观察，我真的不确定为什么要包含“1=1”。这将永远成为现实。而获得所有/相同数据的原因可能是OR语句。您可能需要将OR语句分组到括号中

AND ( 
       ad.grad_year BETWEEN '0   '  AND '2050' 
    OR fa.assignment1 = 0 
    OR fa.assignment2 = 0 
    OR fa.assignment3 = 0 
    OR fa.assignment4 = 0 
    OR fa.assignment5 = 0
    )
    AND pr.ex_yyyy BETWEEN '0'  AND '100' 
    AND (
       pr.emp_gross BETWEEN '0'  AND '50000000' 
    OR apr.ExpSalary BETWEEN '0'  AND '50000000')

还要注意的是，在between语句中变量输出上的空格，您可能还需要处理它