Question

I got the table structure as follows

--------------------------------
id   processId   newId     value
--------------------------------
1        1        1         a
2        1        2         b
3        1        4         c
4        2        5         d
--------------------------------

and

------------------------
id   processId  mapnewId
------------------------
1        1        1
2        1        2
------------------------

How should i get the value “c” (that means i should get the value which is not mapped to “1” in the second table) from the table in which the id mapped.

Answer 1

Here is the answer for single record

Select 
    t1.processId,
    t1.newId,
    t1.value,
    t2.processId,
    t2.mapnewId
FROM  t1
LEFT JOIN t2 
ON t1.processId = t2.processId and t1.newId =  t2.mapnewId
where t1.processId = 1 and t2.processId is null