I need a fast way (sql only preferred) to solve the following problem:
I need the smallest integer that is greater than zero that is not in the
column of a table. In other words, if an 'id' column has values
1,2,3,4,6 and 7, I need a query that returns the value of 5.
I've already worked out a query using generate_series (not scalable) and
pl/pgsql. An SQL only solution would be preferred, am I missing
something obvious?
Merlin