Question

是否可以在存储过程中使用带有xquery语句的逻辑和运算符，只有在其父元素具有特定值并且具有特定值时才删除该元素？如：

SET @profiles_xml = (SELECT profiles from tbl_applied_profiles WHERE profiles.value('(Profile/ID)[1]','int')= @profile_id)
    SET @profiles_xml.modify('
    delete
    if(/Profile/User/ID=sql:variable("@user_id")) and (/Profile/User/Activities/Activity/Name = sql:variable("@activity_name"))
    then (/Profile/User/Activities/Activity)
    else()
    ')

仅当User ID元素和Activity Name元素与给定参数匹配时，我才想删除Activity。 profiles_xml中的xml如下所示：

<Profile>
  <ID>20</ID>
  <User>
    <ID>BC4A18CA-AFB5-4268-BDA9-C990DAFE7783</ID>
    <Name>somename</Name>
    <Activities>
      <Activity>
         <Name>activity1</Name>
      </Activity>
    </Activities>
  </User>
</Profile>

但是将来可能会有多个元素和多个元素作为元素的子元素。

Answer 1

declare @XML xml = '
<Profile>
  <ID>20</ID>
  <User>
    <ID>BC4A18CA-AFB5-4268-BDA9-C990DAFE7783</ID>
    <Name>somename</Name>
    <Activities>
      <Activity>
         <Name>activity1</Name>
      </Activity>
    </Activities>
  </User>
</Profile>'

declare @user_id nvarchar(50) = '20'
declare @activity_name nvarchar(50) = 'activity1'

set @XML.modify('delete /Profile[ID = sql:variable("@user_id")]
                        /User/Activities/
                        Activity[Name = sql:variable("@activity_name")]') 

select @XML

在sql中使用逻辑和xquery删除

1 个答案: