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POSQL Query join with a count and avg from another table
 

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    <p>Actually the math doesn't seem to be adding up. </p> <p>Here is the query I'm using and the 2 table's i'm trying to access (with all real data).</p> <p>This query in SQL is pulling <code>Steve Smith</code> to have 27 sum and 27 count of <code>amount</code>. It should be 17. In the same query it is showing <code>John Smith</code> to have 4 sum and 2 count of <code>amount</code>.</p> <pre><code>SELECT user.*, IFNULL(SUM(collection.amount), 0) AS usertotal, COUNT(collection.amount) AS userunique FROM user LEFT JOIN collection ON user.id = collection.userid GROUP BY collection.amount` </code></pre> <p>Table 1 (named <code>user</code>):</p> <pre><code>id | firstname | lastname | username | email 1 | Steve | Smith | SteveS | Steve@Smith.com 2 | John | Smith | JohnSmith| John@Smith.com </code></pre> <p>Table 2 (named <code>collection</code>):</p> <pre><code>id|userid|carid |amount 1 1 74 1 10 2 130 1 11 2 48 1 12 2 414 1 13 2 415 1 14 2 66 1 15 2 404 1 16 2 57 2 17 2 331 1 18 2 264 1 19 2 325 1 20 2 51 2 21 2 185 1 24 1 168 1 25 1 11 1 26 1 315 1 27 1 51 1 28 1 210 1 29 1 433 1 30 1 434 1 31 1 460 1 32 1 75 1 33 1 238 1 34 1 226 1 35 1 396 1 36 1 174 1 37 1 12 1 38 1 328 1 39 1 4 1 id| UN | Amount 1 | 4 | 457 2 | 4 | 28 3 | 2 | 234 4 | 1 | 235 5 | 2 | 1 </code></pre> <p>I need a query to get the entire list of names of users, and inner join (with sum and count on the amount column) between user.id and collection.UN</p> <p>I don't know the SQL query, can't figure it out for the life of me. Help?</p> <p>Thanks,</p>
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