c# - How to do Searching and Filtering Data based on Checkboxes in Many to Many Relationship in SQL? -


basically have 3 tables (with many many relationship); enter image description here , querying searching this;

alter proc [dbo].[usp_contactsearch]   (    @personname varchar(60)= '',    @mobileno varchar(20)= '',    @nationlity varchar(50)='' ,  @contacttypes varchar(max) = '' )     begin      select distinct c.contactid, c.personname, ct.contacttype, ct.contacttypeid    contact c     left outer join contactwithcontacttype cct   on c.contactid = cct.contactid   left outer join contacttype ct   on cct.countacttypeid = ct.contacttypeid          c.personname case when @personname='' c.personname else '%'+@personname+'%' end     ,       c.mobileno1 case when @mobileno='' c.mobileno1 else '%'+@mobileno+'%' end     ,       c.nationality case when @nationlity='' c.nationality else '%'+@nationlity+'%' end    end

so, result data default is;
enter image description here
so, front end, have contacttypes (which dynamic i.e comming contact types table), , interface looks this

enter image description here
now, whenever user check propertyowner(contacttypeid=1), data should filtered , contacts should shown belong contacttypeid=1 silarly, when check second checkbox i.e tenant(contacttypeid=2). data should more filtered , contacts displayed belongs contacttypeid= 1 , 2. , 3rd contacttype, data should more filtered , on , forth.
so, problem contacttypes dynamic , don't know how handle situation.
regards query , performance apreciated.

try this. work...

-- user defined table type variable declare @mytypedatatype conttype  -- pass value variable front end insert @mytypedatatype values(1),(2),(3); -- front end pass  -- selected values "table type variable" ,  -- "varchar" variable declare @type varchar(20); set @type = '1,2,3';  select x.*  (     -- query persons,       -- have 1 type u want search...     select      c.*,ctt.contacttype, ctt.contacttypeid contact c     inner join  contactwithtype ct     on          c.contactid = ct.contactid     inner join  contacttype ctt      on          ctt.contacttypeid = ct.contacttypeid           @type '%' + cast(  ct.contacttypeid varchar(max)) + '%' ) x inner join  (     -- count record of each person,     -- how many time persons record exists..     select      c.contactid, count(c.contactid) total                contact c     inner join  contactwithtype ct     on          c.contactid = ct.contactid     inner join  contacttype ctt      on          ctt.contacttypeid = ct.contacttypeid           @type '%' + cast(  ct.contacttypeid varchar(max)) + '%'     group    c.contactid )y on  x.contactid = y.contactid -- filter persons ,  y.total = (select count(*) @mytypedatatype)

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