Question

I have two tables that have following rows:

Table1

ID  Name Number 
===================== 
1    a    100 
2    b    200 
3    c    300

Table2

ID Number Check
=====================
1   100     0
2   200     1
3   300    null

Now I want the following table:

table
---------------------
Name Number check
=====================
a     100    0
c     300   null

What query I must to write.

*You notice that the column of check in the row of ‘c’ in final table is null.

Thanks.

Answer 1

Left outer join is your friend:

select table1.name, table1.nmber, table2.check from table1 left outer join table2 on table1.nmber = table2.number