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POSQL Query Returning Duplicate Results
 

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  1. POSQL Query Returning Duplicate Results
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    <p>I've been working out this query now for a while and I thought I had it where I wanted it, but apparently not.</p> <p>There are two records in the database (orders). The query should return two different rows, but instead returns two rows that have exactly the same values. I think it may be something to do with the GROUP BY or derived tables I'm using but my eyes are tired and not seeing the problem. Can any of you help? Thanks in advance.</p> <pre><code>SELECT orders.billerID, orders.invoiceDate, orders.txnID, orders.bName, orders.bStreet1, orders.bStreet2, orders.bCity, orders.bState, orders.bZip, orders.bCountry, orders.sName, orders.sStreet1, orders.sStreet2, orders.sCity, orders.sState, orders.sZip, orders.sCountry, orders.paymentType, orders.invoiceNotes, orders.pFee, orders.shipping, orders.tax, orders.reasonCode, orders.txnType, orders.customerID, customers.firstName AS firstName, customers.lastName AS lastName, customers.businessName AS businessName, orderStatus.statusName AS orderStatus, IFNULL(orderItems.itemTotal, 0.00) + orders.shipping + orders.tax AS orderTotal, IFNULL(orderItems.itemTotal, 0.00) + orders.shipping + orders.tax - IFNULL(payments.totalPayments, 0.00) AS orderBalance FROM orders LEFT JOIN customers ON orders.customerID = customers.id LEFT JOIN orderStatus ON orders.orderStatus = orderStatus.id LEFT JOIN ( SELECT orderItems.orderID, SUM(orderItems.itemPrice * orderItems.itemQuantity) as itemTotal FROM orderItems GROUP BY orderItems.orderID ) orderItems ON orderItems.orderID = orders.id LEFT JOIN ( SELECT payments.orderID, SUM(payments.amount) as totalPayments FROM payments GROUP BY payments.orderID ) payments ON payments.orderID = orders.id </code></pre>
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    1. USJesse Bunch
    1. USJesse Bunch
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    1. COI don't think I'm familiar with an `IFNULL` keyword. If that's not a typo (`ISNULL`?) then you should tag this with the correct platform.
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      1. USAaronaught
    2. COTry removing the joins one by one until you get the single row you expect. The last one removed is the culprit.
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      1. USDavid Sykes
    3. COIFNULL is the ISNULL equivalent in MySQL
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      1. POSQL Query Returning Duplicate Results
      1. USJesse Bunch
 

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