Totaling and Displaying Tables

Question

Say I have a table called CARS and the row CAR_PURCHASE_AMOUNT which says how many cars were bought.
I want to display...
- the CAR_PURCHASE_DATE
- the total number of cars bought on each date from the CARS table sorted with the most recent PURCHASE_DATE first
I think my query is something similar to this, but i need more help!!
SELECT CAR_PURCHASE_DATE, CAR_PURCHASE_AMOUNT
FROM CARS
WHERE (what should I put here???)
ORDER BY CAR_PURCHASE_DATE DESC;
TURN THIS TABLE
TABLE CARS
MODEL CAR_PURCHASE_AMOUNT CAR_PURCHASE_DATE
CIVIC 12 10/15/10
COROLLA 15 09/12/10
CAMRY 20 8/04/10
RSX 10 10/15/10
PRIUS 20 09/12/10
ALTIMA 7 08/17/10
TO THIS:
CAR_PURCHASE_AMOUNT CAR_PURCHASE_DATE
22 10/15/10
35 09/12/10
7 08/17/10
20 8/04/10
(i got that from adding, for example from the first table for 10/15...12 + 10 =22)

Answer 1

Hi,
JayQuan wrote:
i did??? plz read post 1Sorry, I still can't see it.
JayQuan wrote:
Say I have a table called CARS and the row CAR_PURCHASE_AMOUNT which says how many cars were bought.
I want to display...
- the CAR_PURCHASE_DATE
- the total number of cars bought on each date from the CARS table sorted with the most recent PURCHASE_DATE first
I think my query is something similar to this, but i need more help!!
SELECT CAR_PURCHASE_DATE, CAR_PURCHASE_AMOUNT
FROM CARS
WHERE (what should I put here???)
ORDER BY CAR_PURCHASE_DATE DESC;
TURN THIS TABLE
TABLE CARS
MODEL CAR_PURCHASE_AMOUNT CAR_PURCHASE_DATE
CIVIC 12 10/15/10
COROLLA 15 09/12/10
CAMRY 20 8/04/10
RSX 10 10/15/10
PRIUS 20 09/12/10
ALTIMA 7 08/17/10
TO THIS:
CAR_PURCHASE_AMOUNT CAR_PURCHASE_DATE
22 10/15/10
35 09/12/10
7 08/17/10
20 8/04/10
(i got that from adding, for example from the first table for 10/15...12 + 10 =22)Are you sure you posted a CREATE TABLE statement? Where is it?
Did you post INSERT statements? Where are they?
I see the intended results. It would be easier to read, however, if they were formatted, like this:
CAR_PURCHASE_AMOUNT     CAR_PURCHASE_DATE
                 22     10/15/10
                 35     09/12/10
                  7     08/17/10
                 20      8/04/10What are the (incorrect) results you got from the query that Maxim offered?
What is the problem with those results?
Explain, step by step, how you would compute the correct results in each of the places where Maxim's solution was wrong.
It might help if you posted the copy of Maxim's query that you ran, even if you just copied it from this site and pasted it into you script. Sometimes, a slight mistake can occur in eiditing, perhaps one character got deleted accidentally, but that's enough to ruin the results.
Since I don't have copies of your tables, I can't test it myself, but it looks like Maxim's solution should produce exactly the results you posted, except that all the dates would be formatted the same way. Is that the problem? If so, explain why you don't want the leading '0' in '8/04/10', but you do want it in '09/12/10' and '08/17/10'.