Try indexing your data as follows: C01,C02,C03,C04,C09,C12,C23,C50 instead of
C1,C2,C3,C4,C9,C12,C23,C50 and the sort order would work correctly. BTW, what you are describing as an issue is NOT unique to Solr. The same happens on regular Databases as well. Google up how database type systems perform alphanumeric sorts - and you'll know why. -- View this message in context: http://lucene.472066.n3.nabble.com/How-to-sort-value-that-numeric-mix-alpha-tp4144615p4144616.html Sent from the Solr - User mailing list archive at Nabble.com.