countStep
{ "count", 0, SQLITE_NUMERIC, 0, countStep, countFinalize },
{ "count", 1, SQLITE_NUMERIC, 0, countStep, countFinalize },
sqlite_create_aggregate(db, "x_count", 0, countStep, countFinalize, 0);
sqlite_create_aggregate(db, "x_count", 1, countStep, countFinalize, 0);