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@@ -2,7 +2,7 @@
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```sql
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SELECT c.id, c.name,
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SELECT c.id, c.name, a.avol, b.bvol
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FROM table_c AS c
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@@ -18,10 +18,8 @@
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) AS b ON c.id = b.id
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GROUP BY c.id
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ORDER BY c.id;
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```
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[http://sqlfiddle.com/#!9/d249d6/
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[http://sqlfiddle.com/#!9/d249d6/10](http://sqlfiddle.com/#!9/d249d6/10)
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