Help with joining one table to several

Question

I have the following table
MSELECT
Res_ID
Res_type
34
501
56
501
72
501
81
502
90
502
100
502
47
503
48
503
The RES_ID will link to different tables such as tablea, tableb or tablec based on the RES_Type value .g. RES_Type ID 501 will link to tableA and 502 will link to TableB and 503 will link to TableC.
I have created the following query:
Select * from MSSELECT MSEL
Inner join tablea  ta on
Ta.id = MSEL.ID and
Res_type = 501
Inner join tableb tb on
Tb.id = MSEL.ID and
Res_type = 501
If I run the following query then results are returned.
 Select * from MSSELECT MSEL
Inner join tablea  ta on
Ta.id = MSEL.ID and
Res_type = 501
However if I run the following query it is returning no results:
Select * from MSSELECT MSEL
Inner join tablea  ta on
Ta.id = MSEL.ID and
Res_type = 501
Inner join tableb tb on
Tb.id = MSEL.ID and
Res_type = 501

Answer 1

Try:
Select * from MSSELECT MSEL
LEFT OUTER join tablea  ta on
Ta.id = MSEL.ID and
Res_type = 501
LEFT OUTER  join tableb tb on
Tb.id = MSEL.ID and
Res_type = 501
Best Wishes, Arbi; Please vote if you find this posting was helpful or Mark it as answered.