Question

我在xml列（非类型）中有以下xml数据，名为xml_response

<SEIContent>    
<Request>
<eq:Charge>
  <v:Type>MaintCharge</v:Type>
  <v:Term>0</v:Term>
  <v:StartMonth>0</v:StartMonth>
  <v:EndMonth>0</v:EndMonth>
  <v:Rate>0</v:Rate>
  <v:RebateRatio>0</v:RebateRatio>
  <v:MaxRebate>0</v:MaxRebate>
  <v:TieredCharge>
    <v:Term>0</v:Term>
    <v:Rate>0.75</v:Rate>
    <v:LowerBand>0</v:LowerBand>
    <v:UpperBand>249999.99</v:UpperBand>
    <v:BandCurrency>GBP</v:BandCurrency>
  </v:TieredCharge>
  <v:TieredCharge>
    <v:Term>0</v:Term>
    <v:Rate>0.7</v:Rate>
    <v:LowerBand>250000</v:LowerBand>
    <v:UpperBand>499999.99</v:UpperBand>
    <v:BandCurrency>GBP</v:BandCurrency>
  </v:TieredCharge>
  <v:TieredCharge>
    <v:Term>0</v:Term>
    <v:Rate>0.6</v:Rate>
    <v:LowerBand>500000</v:LowerBand>
    <v:UpperBand>999999.99</v:UpperBand>
    <v:BandCurrency>GBP</v:BandCurrency>
  </v:TieredCharge>
  <v:TieredCharge>
    <v:Term>0</v:Term>
    <v:Rate>0.5</v:Rate>
    <v:LowerBand>1000000</v:LowerBand>
    <v:UpperBand>9999999.99</v:UpperBand>
    <v:BandCurrency>GBP</v:BandCurrency>
  </v:TieredCharge>
</eq:Charge>  
 <eq:Charge>
  <v:Type>MaintCharge</v:Type>
  <v:Term>0</v:Term>
  <v:StartMonth>0</v:StartMonth>
  <v:EndMonth>59</v:EndMonth>
  <v:Rate>1.5</v:Rate>
  <v:RebateRatio>0</v:RebateRatio>
  <v:MaxRebate>0</v:MaxRebate>
</eq:Charge>
<eq:Charge>
  <v:Type>MaintCharge</v:Type>
  <v:Term>0</v:Term>
  <v:StartMonth>60</v:StartMonth>
  <v:EndMonth>0</v:EndMonth>
  <v:Rate>0.5</v:Rate>
  <v:RebateRatio>0</v:RebateRatio>
  <v:MaxRebate>0</v:MaxRebate>
</eq:Charge>
<eq:Charge>
  <v:Type>QAC</v:Type>
  <v:Basis>FixedAmount</v:Basis>
  <v:Term>0</v:Term>
  <v:StartMonth>0</v:StartMonth>
  <v:EndMonth>0</v:EndMonth>
  <v:Rate>105</v:Rate>
  <v:RebateRatio>0</v:RebateRatio>
  <v:MaxRebate>0</v:MaxRebate>
</eq:Charge>
</Request>
<Response>
  <eq:Ref>QV00000393</eq:Ref>
</Response>
</SEIContent>

所以你会注意到一些费用包含重复元素TieredCharge而有些则不包含

我写了以下查询：

WITH XMLNAMESPACES('http://lu/blah' AS eq, 'http://lu/blah2' AS v,
  DEFAULT 'http://lu/blah3'
 SELECT
 nref.value('Response[1]/eqRef[1]', 'nvarchar(200)') Ref,
 ncharge.value('v:Type[1]', 'nvarchar(50)') ChargeType,
 ncharge.value('v:Basis[1]', 'nvarchar(50)') ChargeBasis,
 ncharge.value('v:Term[1]', 'int') Term,
 ncharge.value('v:StartMonth[1]', 'int') StartMonth,
 ncharge.value('v:EndMonth[1]', 'int') EndMonth,
 ncharge.value('v:Rate[1]', 'money') Rate,
 ncharge.value('v:RebateRatio[1]', 'money') RebateRatio,
 ncharge.value('v:MaxRebate[1]', 'money') MaxRebate,
 tcharge.value('v:Term[1]', 'int') TieredTerm,
 tcharge.value('v:Rate[1]', 'money') TieredRate,
 tcharge.value('v:LowerBand[1]', 'money') TieredLowerBand,
 tcharge.value('v:UpperBand[1]', 'money') TieredUpperBand
 INTO #TempCharges
 FROM xml_response CROSS APPLY response_body.nodes('//SEIContent') AS Quote(nref) 
 CROSS APPLY response_body.nodes('//Request//eq:Charge') AS Charge(ncharge) 
 CROSS APPLY response_body.nodes('//Request//eq:Charge//v:TieredCharge') AS TieredCharge(tcharge)
 WHERE nref.value('Request[1]/eq:Product[1]', 'nvarchar(60)') <> 'AVL'

 select * from #TempCharges

所以虽然这会使xml变平，但即使eq：Charge元素不包含v：TieredCharge重复元素，我得到的也是重复行？

例如，我得到4行，其中费用类型是QAC，即使只有一个具有该类型的元素？

我如何查询这个，这样我每个Charge元素只能获得一行，除非它下面有重复的子元素，在这种情况下我只会为每个元素重复行？

所以我应该得到这样的东西：

 MaintChange TieredCharge1 row
 MaintChange TieredCharge2 row
 MaintChange TieredCharge3 row
 MaintChange TieredCharge4 row
 MaintCharge
 MaintCharge
 QAC

Answer 1

所以诀窍是在查询的最后一位使用OUTER APPLY - 它就像一个内连接。然后就行了。

在sql server中展平xml数据

1 个答案: