Question

say, I have a varchar(18) field(name:firmware) in a mysql database table.

The string format is like: ABC100-DE-3.10-0347, or it might looks like ABC100-DE-3.1-347. Basically, the only thing I can rely on is the "-" delimiter, the last part(0347,347) is called build number.

The 3.1/3.10 part is called version number. Is it possible to only select the build number and version number out from this field? I suspect this query might turn help to regex, since string functions won’t do the job.

Thanks!

Answer 1

Give this a shot:

select SUBSTRING_INDEX(theField,'-',-1) as buildNumber,
       SUBSTRING_INDEX(SUBSTRING_INDEX(theField,'-',-2),'-',1) as versionNumber
from theTable