How to select first table record when joined field not contain any data

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I want output as Printers,Printers,null (select at least first two fields)
with this very existing query and any kind of join

select a.acName,a.discription,s.quentity from #Accounts a
inner join #stock s on a.id = s.acId where addDate between '2001-11-01' and '2001-11-11' and a.id = 1

What I have tried:

this is the scenario

create table #Accounts(id int, acName nvarchar(50), discription nvarchar(128))
insert into #Accounts values (1, 'Printers', 'Printers')
insert into #Accounts values (2, 'HD', 'HD')
insert into #Accounts values (3, 'Mouse', 'Mouse')
insert into #Accounts values (4, 'Monitor', 'Monitor')
create table #stock(id int, acId int, quentity int,addDate datetime )
insert into #stock values (1,1,20,'2001-01-01')
insert into #stock values (1,2,10,'2001-10-01')
insert into #stock values (1,3,11,'2001-12-01')
insert into #stock values (1,4,5,'2001-11-01')

select a.acName,a.discription,s.quentity from #Accounts a
inner join #stock s on a.id = s.acId where addDate between '2001-11-01' and '2001-11-11' and a.id = 1

Posted 18-Apr-17 21:36pm

QuentinEllison

Updated 19-Apr-17 0:38am

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NightWizzard · Answer 1 · 2017-04-18T22:24:00

Solution 1

INNER JOIN restricts the result to those records that have matches on both sides. To always return all records from first table (and matching records or NULL values from second table) use LEFT JOIN.

Posted 18-Apr-17 22:24pm

NightWizzard

Comments

QuentinEllison 19-Apr-17 4:54am

not working in this case because of where
try the given table n show me the solution if you do have any
thanks

NightWizzard · Answer 2 · 2017-04-18T23:57:00

Solution 3

Use this:

SQL

select TOP 1  a.acName,a.discription,IsNULL(CAST(s.quentity AS nvarchar(10)), 'null') from #Accounts a
left join #stock s on a.id = s.acId where addDate between '2001-11-01' and '2001-11-11' and a.id = 1

Posted 18-Apr-17 23:57pm

NightWizzard

Comments

CHill60 19-Apr-17 6:19am

Still returns no data because of the WHERE - see my solution for how to overcome that

CHill60 · Answer 3 · 2017-04-19T00:18:00

Solution 4

You need to use LEFT OUTER JOIN and cater for scenarios where nothing is being returned by the join. Like this

SQL

select * from #Accounts A
left outer join #stock S on A.id=S.acId
where A.id = 1 
AND ((addDate between '2001-11-01' and '2001-11-11')
	OR addDate IS NULL)

Posted 19-Apr-17 0:18am

CHill60

NightWizzard · Answer 4 · 2017-04-19T00:38:00

Solution 5

Thanks CHill60 - I've overseen that addDate is also from second table.
To return the 'null' for quantity let's complete it at last:

SQL

select a.acName,a.discription,IsNULL(CAST(s.quentity AS nvarchar(10)), 'null') 
from #Accounts a
left join #stock s on a.id = s.acId 
where ((s.addDate between '2001-11-01' and '2001-11-11')
or (s.addDate is null))
and (a.id = 1)

Posted 19-Apr-17 0:38am

NightWizzard

Comments

CHill60 19-Apr-17 7:31am

I only found this comment by accident. If you want to respond then use the Have a Question or Comment? link next to a post.

It's also not deemed good practice to post multiple solutions to the same question - other members coming across this will be confused as to which of your solutions to use. You can use the Improve solution link to update your earlier efforts. Particularly so in this case as Solution 3 is incorrect and Solution 5 is essentially a repost of mine