Select unique rows from a select query result - sql

Question

I have procedure in which I am getting data from 4 tables by joining them.
Here is my code
alter PROCEDURE [dbo].[GetServiceRequestforLead]
#professionalArea nvarchar (35) = '',
#status nvarchar (15) = '',
#experience nvarchar (15) = '',
#PageNumber BIGINT = 1,
#PageSize BIGINT =20,
#userid bigint = 0
AS
BEGIN
SELECT *
FROM (
SELECT Row_number() OVER (ORDER BY sc.Addeddate DESC) AS Row, sc.*
, TotalRows = Count(*) OVER()
FROM (
select Mod_UserDetails.Email as LeadEmailId, Mod_UserDetails.ID as LeaduserId
, ProfessionType, Mod_UserDetails.FirstName as LeadFirstName, Mod_UserDetails.LastName as LeadLastName
, Mod_UserDetails.PhoneNo1 as LeadMobile
, f.*
from Lead_RequestForm f
inner join Lead_ProfessionalArea on Lead_ProfessionalArea.ID = f.Profession
left join ServiceProviderRequestMapping on f.RequestId = ServiceProviderRequestMapping.RequestId
left join mod_userdetails on mod_userdetails.ID = ServiceProviderRequestMapping.Leaduserid
where f.ExperienceRequired like '%'+#experience+'%'
AND f.Status like '%' + #status + '%'
AND Lead_ProfessionalArea.ProfessionType like '%'+ #professionalArea +'%'
AND (ServiceProviderRequestMapping.IsDeleted is null OR ServiceProviderRequestMapping.IsDeleted = 0)
) sc
) AS query
WHERE row > ( #PageSize *( #PageNumber -1))
AND row <= ( #PageSize * #PageNumber )
END
By executing this I am getting more than one row for RequestId column of Lead_RequestForm f table. Data is unique in both the rows but reuqest id is the same. I want to get only the first record with the same Requestid column.
i have added snap here request id column has duplicate value i want only one roq with a request id so want to select first one only

Answer 1

You can do as below -
alter PROCEDURE [dbo].[GetServiceRequestforLead]
#professionalArea nvarchar (35) = '',
#status nvarchar (15) = '',
#experience nvarchar (15) = '',
#PageNumber BIGINT = 1,
#PageSize BIGINT =20,
#userid bigint = 0
AS
BEGIN
Select Tb.*
from
(SELECT t.*, row_number() OVER (partition by RequestId order by Rowid) as seq_nbr
FROM (
SELECT Row_number() OVER (ORDER BY sc.Addeddate DESC) AS Row, sc.*
, TotalRows = Count(*) OVER()
FROM (
select Mod_UserDetails.Email as LeadEmailId, Mod_UserDetails.ID as LeaduserId
, ProfessionType, Mod_UserDetails.FirstName as LeadFirstName, Mod_UserDetails.LastName as LeadLastName
, Mod_UserDetails.PhoneNo1 as LeadMobile
, f.*
from Lead_RequestForm f
inner join Lead_ProfessionalArea on Lead_ProfessionalArea.ID = f.Profession
left join ServiceProviderRequestMapping on f.RequestId = ServiceProviderRequestMapping.RequestId
left join mod_userdetails on mod_userdetails.ID = ServiceProviderRequestMapping.Leaduserid
where f.ExperienceRequired like '%'+#experience+'%'
AND f.Status like '%' + #status + '%'
AND Lead_ProfessionalArea.ProfessionType like '%'+ #professionalArea +'%'
AND (ServiceProviderRequestMapping.IsDeleted is null OR ServiceProviderRequestMapping.IsDeleted = 0)
) sc
) AS query
WHERE row > ( #PageSize *( #PageNumber -1))
AND row <= ( #PageSize * #PageNumber )
)t
)Tb
where Tb.seq_nbr = 1
END