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                    TableIdentifier sample_00276
                    SampleRatio 1 / 100
                    SampleRatio 98 / 100
                SelectQuery (children 2)
                 ExpressionList (children 1)
                  Asterisk
                 TablesInSelectQuery (children 1)
                  TablesInSelectQueryElement (children 1)
                   TableExpression (children 3)
                    TableIdentifier sample_00276
                    SampleRatio 1 / 100
                    SampleRatio 99 / 100
          ExpressionList (children 1)
           Identifier x
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           ExpressionList (children 2)
            Identifier c
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          ExpressionList (children 1)
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