Question

UPDATING QUESTION:

ERROR:  column "Fruits" does not exist

Running Postgres 7.4(Yeah we are upgrading)

Why can’t I ORDER BY the column alias? wants tof.”TypeOfFruits” in the ORDER BY as well, why?

SELECT (CASE
    WHEN tof."TypeOfFruits" = 'A' THEN 'Apple' 
    WHEN tof."TypeOfFruits" = 'P' THEN 'Pear' 
    WHEN tof."TypeOfFruits" = 'G' THEN 'Grapes' 
    ELSE 'Other' END) AS "Fruits",
    SUM(CASE WHEN r.order_date 
        BETWEEN DATE_TRUNC('DAY', LOCALTIMESTAMP) AND DATE_TRUNC('DAY', LOCALTIMESTAMP) + INTERVAL '1 DAY' 
        THEN 1 ELSE 0 END) AS daily, 
    SUM(CASE WHEN r.order_date 
        BETWEEN DATE_TRUNC('MONTH', LOCALTIMESTAMP) AND DATE_TRUNC('MONTH', LOCALTIMESTAMP) + INTERVAL '1 MONTH' 
        THEN 1 ELSE 0 END) AS monthly, 
    SUM(CASE WHEN r.order_date 
        BETWEEN DATE_TRUNC('YEAR', LOCALTIMESTAMP) AND DATE_TRUNC('YEAR', LOCALTIMESTAMP) + INTERVAL '1 YEAR' 
        THEN 1 ELSE 0 END) AS yearly, 
    SUM(CASE WHEN r.order_date >= '01-01-2011 00:00:00' THEN 1 ELSE 0 END) AS lifetime 
FROM reports AS r, "TypeOfFruits" AS tof 
WHERE r.id = tof."ID" 
GROUP BY "Fruits"
ORDER BY CASE 
    WHEN "Fruits" = 'Apple' THEN 1 
    WHEN "Fruits" = 'Pear' THEN 2 
    WHEN "Fruits" = 'Grapes' THEN 3 
    ELSE 4 
END

Results as of now

Fruits;daily;monthly;yearly;lifetime
"Apple";17;1174;3136;3136
"Pear";28;94;94;94
"Grapes";0;191;490;490
"Other";0;2;27;27
"Other";0;0;1;1
"Other";0;0;27;27
"Other";0;6;28;28
"Other";0;58;229;229
"Other";0;3;3;3
"Other";0;0;1;1

Desired results would be one row with the “Other” total, so four rows altogether
(x would be the total)

Fruits;daily;monthly;yearly;lifetime
"Apple";17;1174;3136;3136
"Pear";28;94;94;94
"Grapes";0;191;490;490
"Other";x;x;x;x

Answer 1

You can use ORDER BY 1 to order by the first field, which is “Fruits”. The same is valid for GROUP BY

Update

For the order, instead of doing the case in the order by, create a new column in.. say.. the second position:

(CASE 
    WHEN "Fruits" = 'Apple' THEN 1 
    WHEN "Fruits" = 'Pear' THEN 2 
    WHEN "Fruits" = 'Grapes' THEN 3 
    ELSE 4 ) as Order

Then in you ORDER BY 2.