Hello all, I am wondering if we have a method faster then the INNER JOIN which can be very slow in case of large number of rows, which is my case. I was thinking of a UDF that increment a number if the concatenation of the key column (or group columns) is the same, means: select col1, col2, udf_topN(col1||col2) from TTT order by value group by col1,col2
will result into 1,1,1 1,1,2 1,1,3 2,1,1 2,1,2 2,1,3 4,3,1 4,3,2 etc however I don't really find how to keep, initialize, and destroy a variable in a UDF for a query time execution do you have some idea? is a TopN function planned for the future version of sqlite? Many thanks, Sylvain _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
