Question

I have 3 columns in a table say test with columns say col1,col2,col3, they are foreign keys of a sigle table say test_master…how to write query to get desc column from test_master for those col1,col2,col3 in test.

example

test table
col1 col2 col3
100  101  102

test_master table
id   desc
100  testdata1 
101  testdata1 
102  testdata1 
103  testdata1 

help please…

Answer 1

You need to do three joins on the same table:

  select tm1.desc, tm2.desc, tm3.desc
  from test t
  join test_master tm1 on t.col1=tm1.id
  join test_master tm2 on t.col2=tm2.id
  join test_master tm3 on t.col3=tm3.id