Hi! I'm filling a TTree from a SQL-recordset. This made me wonder, if there are some options in TTree, that exist in SQL: 1. TTree::Scan("column1"); returns me all values of column1. Is there an option "DISTINCT", which returns each value in column1 exactly once? 2. Is there something like a "LIKE"-function for the selector in TTree::Draw? If column1 is of type C-string. Then I might want to have all the entries, whose column1 starts with "AB". In SQL one could use something like: "column1 like \"AB%\"" Is something like that possible in a TTree-selector 3. Is there a GROUP BY-clause (along with some basic aggregate-functions: avg, std, min, max, count), when you think of the selector as the WHERE-clause? Thank you, Bernd.
This archive was generated by hypermail 2b29 : Sun Jan 02 2005 - 05:50:08 MET