Re: Query writing

From: Tim Gorman <tim_at_evdbt.com>
Date: Thu, 19 Dec 2013 10:08:09 -0700
Message-ID: <52B327F9.1080203_at_evdbt.com>

The OP's blog <http://arifgulzar.blogspot.com/> does carry the title "Productivity Freak"; nice to see truth in advertising.

On 12/19/2013 9:50 AM, Walker, Jed S wrote:
>
> What is the rate per hour?
>
> *From:*oracle-l-bounce_at_freelists.org
> [mailto:oracle-l-bounce_at_freelists.org] *On Behalf Of *Arif Gulzar
> *Sent:* Wednesday, December 18, 2013 1:47 PM
> *To:* oracle-l
> *Subject:* Query writing
>
> Please forward me following 2 quires. Thanks in advance.
>
> *Q1: Given the following table of transactions in a cash register:*
>
> id| trade_time | amount
>
> -- ---------------- ------
>
> 1| 06/16/2013 11:43| 52.00
>
> 2| 06/16/2013 11:50| 142.74
>
> 3| 06/16/2013 14:21| -43.89
>
> 4| 06/17/2013 12:50| 36.85
>
> 5| 06/17/2013 13:40|-523.58
>
> please write a query which selects net daily turnovers (arithmetical
> sums of all transactions for a day) for all days when these turnovers
> are positive.
>
> *Q2: Given the following two tables:*
>
> clients (id (PK), name)
>
> transactions (id (PK), client_id, trans_date, debit, credit, comment)
>
> transactions.client_id references clients.id <http://clients.id>
>
> please write a query which selects the balance for ALL clients, even
> if they have no transactions. (Assume initial balances to be zeros).
>
> Sample table contents:
>
> clients:
>
> id name
>
> -- ------
>
> 1 John
>
> 2 Mary
>
> 3 Alex
>
> transactions:
>
> id client_id trans_date debit credit comment
>
> -- --------- ---------- ------- ------- -----------------
>
> 1 | 1 06/16/2013 NULL 1000.00 SALARY
>
> 2 | 1 06/18/2013 516.43 0.00 MOB PHONE PAYMENT
>
> 3 | 2 06/16/2013 NULL 1000.00 SALARY
>
> 4 | 2 06/18/2013 200.00 NULL INTERNET PAYMENT
>
> 5 | 2 06/18/2013 500.00 0.00 MOB PHONE PAYMENT
>

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Received on Thu Dec 19 2013 - 18:08:09 CET