db/routines/vn/functions/intrastat_estimateNet.sql

@@ -0,0 +1,19 @@
+DELIMITER $$
+CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `vn`.`intrastat_estimateNet`(intINSTRASTAT INTEGER,intUNIDADES INTEGER)
+	RETURNS double
+	DETERMINISTIC
+BEGIN
+
+	DECLARE n DOUBLE;
+
+	SELECT ROUND(intUNIDADES / (SUM(MEDIA) / COUNT(media)), 2) INTO n FROM
+		(SELECT *, unidades / neto MEDIA
+			FROM vn2008.intrastat_data
+		WHERE intrastat_id = intINSTRASTAT AND neto
+				AND unidades > 0
+		ORDER BY odbc_date DESC
+		LIMIT 20) t;
+	RETURN n/2;
+
+END$$
+DELIMITER ;