Hi, On 27/1/2012 4:16 PM, Josef Kokeš wrote: > Hi! > > I find myself repeatedly writing code such as > > SELECT (a+b)*c AS value1, > some_function((a+b)*c) AS value2, > some_other_function((a+b)*c) AS value 3 > FROM ... > > Is there any other way to "reuse" a calculated value by referencing its > alias than through views? E.g. > > CREATE VIEW valueview AS SELECT SELECT (a+b)*c AS value1 FROM ... > > SELECT value1, some_function(value1) AS value2 ... > > I know I can reference the column by its position in GROUP BY, but I > need to reference it in the field list as well as in the WHERE condition. > > Thanks, > > Pepak How about derived tables? - (supported from version 2.0 onwards)
http://www.firebirdsql.org/refdocs/langrefupd21-select.html#langrefupd21-derived-tables Regards, Jaison Joseph ------------------------------------ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Visit http://www.firebirdsql.org and click the Resources item on the main (top) menu. Try Knowledgebase and FAQ links ! Also search the knowledgebases at http://www.ibphoenix.com ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/firebird-support/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/firebird-support/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
