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POmysql select sum 2 rows from different tables
 

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  1. POmysql select sum 2 rows from different tables
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    <p>I have been trying to find the correct way to sum 2 rows from 2 different tables.</p> <p>I can easily identify the rows I want to sum using these two queries:</p> <pre><code>select * from vui_trading_review_form_client where month = '201202' and client_id='TOTALS'; +--------+------------+-----------+-----------------+-----------------+-----------------+----------------+----------+ | month | dt_end | client_id | amt_balance_GBP | amt_balance_EUR | amt_balance_USD | dt_working_day | order_no | +--------+------------+-----------+-----------------+-----------------+-----------------+----------------+----------+ | 201202 | 2012-02-29 | TOTALS | 2 | 3 | 4 | 2012-02-29 | 2 | +--------+------------+-----------+-----------------+-----------------+-----------------+----------------+----------+ select * from vui_trading_review_form_bank where month = '201202' and provider='TOTALS'; +--------+------------+----------+-----------------+-----------------+-----------------+----------+ | month | dt_end | provider | amt_balance_GBP | amt_balance_EUR | amt_balance_USD | order_no | +--------+------------+----------+-----------------+-----------------+-----------------+----------+ | 201202 | 2012-02-29 | TOTALS | 1 | 1 | 1 | 3 | +--------+------------+----------+-----------------+-----------------+-----------------+----------+ </code></pre> <p>What I would like to achieve is a table which looks as follows</p> <pre><code>+-----------------+-----------------+-----------------+ | amt_balance_GBP | amt_balance_EUR | amt_balance_USD | +-----------------+-----------------+-----------------+ | 1 | 2 | 3 | +-----------------+-----------------+-----------------+ </code></pre> <p>the first 3 totals minus the second three totals.</p> <p>I have tried a join but i'm really struggling to get the right result.</p> <p>Any suggestions would be greatly appreciated.</p>
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    1. USSam Corbet
    1. USSam Corbet
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    1. COYour two queries are from the same table. I assume that's a mistake? Also, are you adding or subtracting those values (looks like subtracting)?
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      1. USJohn Flatness
    2. COHi John, sorry yes that is a mistake. I'm subtracting
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      1. USSam Corbet
    3. COthe name of the two tables are the same? `vui_trading_review_form_client`?
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      1. POmysql select sum 2 rows from different tables
      1. USJohn Woo
 

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