Querying for Contiguous Series
A deceptively simple question:
How to select the first continous group of rows using Oracle SQL (Stackoverflow)
The solution given by Malgrat works nicely. He generates a “gap” column which detects changes in the data, then uses a running total to restrict the results to the first “group”. I haven’t come up with a more elegant solution that doesn’t involve multiple table scans.
About Jeffrey Kemp
Application Designer & Developer at Oracle specialising in Oracle APEX (Application Express), Oracle SQL and PL/SQL. Oracle ACE Alumni ♠️. Piano player, father, husband, Christian. The views expressed on this blog are my own and do not necessarily reflect the views of Oracle.