Question

SQL Select help

Asked by: thomasmutton

I have 2 tables.

table 1
id     name
1      group 1
2      group 2

table 2
id        id of first table
1         1
2         1
3         1

What I would like to do is to SELECT from the first table only if it has records relating to it in the second table. So in the example above, only the record with ID 1 would be seleted.

Any ideas?

Thanks

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Asked On
2009-05-12 at 06:40:25ID24401130
Tags

SQL

,

Select

Topics

SQL Query Syntax

,

Databases Miscellaneous

,

MS SQL Server

Participating Experts
2
Points
500
Comments
14

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Answers

 

by: RiteshShahPosted on 2009-05-12 at 06:42:54ID: 24364449

select t1.id,t1.name from table1 t1 join table2 t2 on t1.id=t2.IdOfFirstTable

 

by: aneeshattingalPosted on 2009-05-12 at 06:43:39ID: 24364455

You can use the INNER join

SELECT t1.*
FROM Table1 t1
INNER join table2 t2 on t1.ID =t2.iD

 

by: RiteshShahPosted on 2009-05-12 at 06:45:10ID: 24364476

option 2)


select t1.id,t1.name
from
table1 t1
left outer join
table2 t2 on
t1.id=t2.IdOfFirstTable
where t2.id is not null

 

by: RiteshShahPosted on 2009-05-12 at 06:45:58ID: 24364483

aneeshattingal,

I guess join should be on t1.ID =t2.IdOfFirstTable not with t2.id........

 

by: thomasmuttonPosted on 2009-05-12 at 06:47:59ID: 24364501

RiteshShah,

I have tried your second option but it does not deliver distinct records. Should I use a distinct?

 

by: RiteshShahPosted on 2009-05-12 at 06:49:49ID: 24364520

you can use it, but what happened to my first query?

 

by: thomasmuttonPosted on 2009-05-12 at 06:50:42ID: 24364528

They have the same outcome

 

by: RiteshShahPosted on 2009-05-12 at 06:53:36ID: 24364560

in that case, I recomend you to go for option 1, it is proper method to go.

 

by: thomasmuttonPosted on 2009-05-12 at 06:54:35ID: 24364577

Ok well this is the command I am using.

it does not work.

SELECT * FROM Gower_tbl_photosforsaleoptiongroups pfsog
JOIN Gower_tbl_photosforsalegroupoptions pfsgo ON
pfsog.pfsog_Id = pfsgo.pfsog_Id

 

by: RiteshShahPosted on 2009-05-12 at 06:56:01ID: 24364591

is this giving you any error?

SELECT pfsog.* FROM Gower_tbl_photosforsaleoptiongroups pfsog
JOIN Gower_tbl_photosforsalegroupoptions pfsgo ON
pfsog.pfsog_Id = pfsgo.pfsog_Id

 

by: thomasmuttonPosted on 2009-05-12 at 06:57:05ID: 24364602

Nope, It is getting the right record from table 1 but just repeating it 3 times.

 

by: RiteshShahPosted on 2009-05-12 at 06:58:23ID: 24364615

in that case, use DISTINCT....

 

by: thomasmuttonPosted on 2009-05-12 at 07:00:26ID: 24364645

Yeah that worked great.

SELECT DISTINCT pfsog.* FROM Gower_tbl_photosforsaleoptiongroups pfsog
JOIN Gower_tbl_photosforsalegroupoptions pfsgo ON
pfsog.pfsog_Id = pfsgo.pfsog_Id

 

by: thomasmuttonPosted on 2009-05-12 at 07:00:41ID: 31580524

SELECT DISTINCT pfsog.* FROM Gower_tbl_photosforsaleoptiongroups pfsog
JOIN Gower_tbl_photosforsalegroupoptions pfsgo ON
pfsog.pfsog_Id = pfsgo.pfsog_Id

20120131-EE-VQP-002

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