Ho due domande che non sono sicuro di come eseguire una semplice matematica.
SELECT count(*) FROM CUSTOMERINFO
where member between "2013-01-01" and "2013-12-31"
Resi: 7823
select COUNT(DISTINCT ORDERINFO.OrderID) from orderinfo, orderiteminfo
where code = "810samp"
AND ORDERINFO.OrderID = ORDERITEMINFO.OrderID
AND orderinfo.PrepareDate between "2013-01-01" and "2013-12-31"
Resi: 4106
Devo restituire la query: 4106/7823 X 100
risposte:
1 per risposta № 1Basta usare questa sintassi:
SELECT (
CAST((<your first query>) as decimal)
/(<your second query>)
* 100
) AS Percents;
Quindi la tua domanda dovrebbe essere
SELECT (
CAST((select COUNT(DISTINCT ORDERINFO.OrderID) from orderinfo, orderiteminfo
where code = "810samp"
AND ORDERINFO.OrderID = ORDERITEMINFO.OrderID
AND orderinfo.PrepareDate between "2013-01-01" and "2013-12-31") as decimal)
/(SELECT count(*) FROM CUSTOMERINFO
where member between "2013-01-01" and "2013-12-31")
* 100
) AS Percents;
Vedere questo SQLFiddle
1 per risposta № 2
Codice non testato ma questo dovrebbe farlo per voi:
SELECT (SELECT count(*) FROM CUSTOMERINFO
where member between "2013-01-01" and "2013-12-31") /
(select COUNT(DISTINCT ORDERINFO.OrderID) from orderinfo, orderiteminfo
where code = "810samp"
AND ORDERINFO.OrderID = ORDERITEMINFO.OrderID
AND orderinfo.PrepareDate between "2013-01-01" and "2013-12-31")
* 100
Un Alternato sarebbe
DECLARE @int1 as int
DECLARE @int2 as int
SET @int1 = (SELECT count(*) FROM CUSTOMERINFO
where member between "2013-01-01" and "2013-12-31")
SET @int2 = (select COUNT(DISTINCT ORDERINFO.OrderID) from orderinfo, orderiteminfo
where code = "810samp"
AND ORDERINFO.OrderID = ORDERITEMINFO.OrderID
AND orderinfo.PrepareDate between "2013-01-01" and "2013-12-31")
SELECT @int1/@int2 X 100