[英]Extracting mutiple values from an XML string stored in a SQL table
嘗試從其值為XML的列中提取數據,如下所示,該列列出了一周中何時運行報告:
WeeklyRecurrence <WeeksInterval>1</WeeksInterval><DaysOfWeek><Sunday>false</Sunday><Monday>true</Monday><Tuesday>false</Tuesday><Wednesday>true</Wednesday><Thursday>false</Thursday><Friday>true</Friday><Saturday>false</Saturday></DaysOfWeek></WeeklyRecurrence>
我如何得到這樣的結果:
Monday true
Wednesday true
Friday true
我曾嘗試使用Substring和Charindex,但這只能獲得第一行。
提前致謝。
DECLARE @t TABLE(schedule XML);
INSERT @t(schedule) VALUES (N'<WeeklyRecurrence><WeeksInterval>1</WeeksInterval><DaysOfWeek><Sunday>false</Sunday><Monday>true</Monday><Tuesday>false</Tuesday><Wednesday>true</Wednesday><Thursday>false</Thursday><Friday>true</Friday><Saturday>false</Saturday></DaysOfWeek></WeeklyRecurrence>');
SELECT
[day] = x.value('local-name(.)', 'nvarchar(max)'),
[present] = x.value('.', 'nvarchar(max)')
FROM @t
CROSS APPLY schedule.nodes('/WeeklyRecurrence/DaysOfWeek/*') w(x)
+-----------+---------+
| day | present |
+-----------+---------+
| Sunday | false |
| Monday | true |
| Tuesday | false |
| Wednesday | true |
| Thursday | false |
| Friday | true |
| Saturday | false |
+-----------+---------+
如果表有多行,請WeeksInterval
@t.ID
-在這種情況下,您需要提取另一個值( WeeksInterval
? @t.ID
?)以進一步區分結果。
這是使用Nodes()
的簡單示例
我不確定您是否只想要TRUE值
Declare @XML xml = '<WeeklyRecurrence><WeeksInterval>1</WeeksInterval><DaysOfWeek><Sunday>false</Sunday><Monday>true</Monday><Tuesday>false</Tuesday><Wednesday>true</Wednesday><Thursday>false</Thursday><Friday>true</Friday><Saturday>false</Saturday></DaysOfWeek></WeeklyRecurrence>'
Select Item = xAttr.value('local-name(.)', 'nvarchar(100)')
,Value = xAttr.value('.','varchar(100)')
From @XML.nodes('//WeeklyRecurrence/DaysOfWeek/*') xNode(xAttr)
返回
Item Value
Sunday false
Monday true
Tuesday false
Wednesday true
Thursday false
Friday true
Saturday false
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