XML 查询问题

Question

我正在尝试生成 SQL 查询以从以下 SQL XML 中获取“DATE”值：

我试过这样的事情，但我不认为我理解这些概念。

select 
   xConfig.value('(/SearchjobConfig/QueryString/SearchCriteria/ExpressionSet/SimpleAttributeExpression) [1]','nvarchar(max)') 
from 
    Job 

这是作为文本的 XML：

select 
   xConfig.value('(/SearchjobConfig/QueryString/SearchCriteria/ExpressionSet/SimpleAttributeExpression) [1]','nvarchar(max)') 
from 
    Job 

预期的输出将是日期：

<SearchJobConfig>
  <QueryID>1072</QueryID>
  <QueryString>
    <SearchCriteria name="Search query" >
      <ExpressionSet logicalOperator="AND">
        <SimpleAttributeExpression displayName="Date" npmPropertyId="4" searchOperation="GREATER_EQUAL" dataType="string" caseSensitive="false">2019-06-01T04:00:00</SimpleAttributeExpression>
        <SimpleAttributeExpression displayName="Date" npmPropertyId="4" searchOperation="LESS_EQUAL" dataType="string" caseSensitive="false">2019-06-13T03:59:59</SimpleAttributeExpression>
        <SimpleAttributeExpression displayName="Class" npmPropertyId="1056" searchOperation="EQUALS" dataType="int32" caseSensitive="false">65</SimpleAttributeExpression>
      </ExpressionSet>
    </SearchCriteria>
  </QueryString>
</SearchJobConfig>

以及在同一行上获得结果需要什么..示例：

2019-06-01T04:00:00
2019-06-13T03:59:59

我正在使用 SQL Server 2012 企业版。

Answer 1

这能得到你想要的吗？

DECLARE @x XML = '
<SearchJobConfig>
  <QueryID>1072</QueryID>
  <QueryString>
    <SearchCriteria name="Search query" >
      <ExpressionSet logicalOperator="AND">
        <SimpleAttributeExpression displayName="Date" npmPropertyId="4" searchOperation="GREATER_EQUAL" dataType="string" caseSensitive="false">2019-06-01T04:00:00</SimpleAttributeExpression>
        <SimpleAttributeExpression displayName="Date" npmPropertyId="4" searchOperation="LESS_EQUAL" dataType="string" caseSensitive="false">2019-06-13T03:59:59</SimpleAttributeExpression>
        <SimpleAttributeExpression displayName="Class" npmPropertyId="1056" searchOperation="EQUALS" dataType="int32" caseSensitive="false">65</SimpleAttributeExpression>
      </ExpressionSet>
    </SearchCriteria>
  </QueryString>
</SearchJobConfig>
'

DECLARE @Job TABLE(xConfig XML)

INSERT @Job ( xConfig )
VALUES ( @x )

SELECT j.*
       , ca.c.value('text()[1]', 'VARCHAR(30)') AS date_val
FROM @Job AS j
CROSS APPLY j.xConfig.nodes('/SearchJobConfig/QueryString/SearchCriteria/ExpressionSet/SimpleAttributeExpression') AS ca(c)
WHERE ca.c.exist('@displayName[.= "Date"]') = 1;

要将所有内容放在一行上，只需执行以下操作：

SELECT *
FROM 
(
    SELECT STUFF(
    (SELECT N' ' + ca.c.value('text()[1]', 'NVARCHAR(MAX)')
     FROM @Job AS j
     CROSS APPLY j.xConfig.nodes('/SearchJobConfig/QueryString/SearchCriteria/ExpressionSet/SimpleAttributeExpression') AS ca(c)
     WHERE ca.c.exist('@displayName[.= "Date"]') = 1
     FOR XML PATH(N''), TYPE ).value(N'.[1]', N'NVARCHAR(MAX)'), 1, 1, N'') 
) AS x(date_val);