Hi,
I have a table which looks like
a1 b1 c1 d1
b1 c1 d1 (a1 value is missing)
a2 b2 c2 d2
b2 c2 d2 ( a2 value is missing)
b3 c3 d2 (a3 value does not exists)
a4 b4 c4 d4
how can I query the table so the result table looks like
a1 b1 c1 d1
a2 b2 c2 d2
b3 c3 d3
a4 b4 c4 d4
Thanks in advance
AshPal