Question

我有一个表'Waterwatch_Active'，其中有一个字段'Att'。

Att字段是一个复杂的串联字段（实际上看起来像html），我需要拆分为以下内容：

site_name
site_code

这是我的表Waterwatch_Active Waterwatch_active example

的Att字段的示例

textattributes>\n  <li><strong><span class="atr-name">site_name</span>:</strong> <span class="atr-value">Walkers Lake</span></li>\n  <li><strong><span class="atr-name">site_code</span>:</strong> <span class="atr-value">NC_LWA001</span></li>\n  \n  \n  <li><strong><span class="atr-name">basin_name</span>:</strong> <span class="atr-value">Avoca River</span></li>\n  \n  \n  \n  <li><strong><span class="atr-name">water_type</span>:</strong> <span class="atr-value">Other</span></li>\n  <li><strong><span class="atr-name">lng</span>:</strong> <span class="atr-value">142.923793</span></li>\n  <li><strong><span class="atr-name">lat</span>:</strong> <span class="atr-value">-36.540724</span></li>\n  <li><strong><span class="atr-name">zone</span>:</strong> <span class="atr-value">54</span></li>\n  \n  \n  <li><strong><span class="atr-name">public_url</span>:</strong> <span class="atr-value">http://www.vic.waterwatch.org.au/site/170005</span></li>\n</ul>

textattributes>\n  <li><strong><span class="atr-name">site_name</span>:</strong> <span class="atr-value">Murray River behind Koondrook PS</span></li>\n  <li><strong><span class="atr-name">site_code</span>:</strong> <span class="atr-value">NC_MUR400</span></li>\n  \n  \n  <li><strong><span class="atr-name">basin_name</span>:</strong> <span class="atr-value">Loddon River</span></li>\n  <li><strong><span class="atr-name">catchment_name</span>:</strong> <span class="atr-value">Loddon River</span></li>\n  <li><strong><span class="atr-name">sub_catchment_name</span>:</strong> <span class="atr-value">Loddon River</span></li>\n  <li><strong><span class="atr-name">reach_name</span>:</strong> <span class="atr-value">7_38 Gunbower Creek</span></li>\n  <li><strong><span class="atr-name">water_type</span>:</strong> <span class="atr-value">Other</span></li>\n  <li><strong><span class="atr-name">lng</span>:</strong> <span class="atr-value">144.130368</span></li>\n  <li><strong><span class="atr-name">lat</span>:</strong> <span class="atr-value">-35.633233</span></li>\n  <li><strong><span class="atr-name">zone</span>:</strong> <span class="atr-value">55</span></li>\n  \n  \n  <li><strong><span class="atr-name">public_url</span>:</strong> <span class="atr-value">http://www.vic.waterwatch.org.au/site/170021</span></li>\n</ul>

我已经弄清楚了如何一次选择一个，但是我需要一次全部选择并生成一个结果表。这就是我设法使site_name消失的方法：

--site_name
DECLARE @SiteNamekeysValueToSearch NVARCHAR(4000) = '"atr-value">'
DECLARE @SiteNameuntilThisCharAppears NVARCHAR(4000) = '</span>'
DECLARE @SiteNamekeysValueToSearchPattern NVARCHAR(4000) = '%' + @SiteNamekeysValueToSearch + '%'

SELECT SUBSTRING(
           Att,
           PATINDEX(@SiteNamekeysValueToSearchPattern, Att) + LEN(@SiteNamekeysValueToSearch),
           CHARINDEX(
               @SiteNameuntilThisCharAppears,
               Att,
               PATINDEX(@SiteNamekeysValueToSearchPattern, Att) + LEN(@SiteNamekeysValueToSearch)
           ) -(PATINDEX(@SiteNamekeysValueToSearchPattern, Att) + LEN(@SiteNamekeysValueToSearch))
       )
FROM Waterwatch_Active
--End site_name

所以理想情况下，我希望我的结果表看起来像这样 Waterwatch_Active result

+----------------------------------+-----------+
|            Site_Name             | Site_Code |
+----------------------------------+-----------+
| Walkers Lake                     | NC_LWA001 |
| Murray River behind Koondrook PS | NC_MUR400 |
+----------------------------------+-----------+

请提供任何帮助，我们将不胜感激，但我决心不放弃。

Answer 1

假设您正在逐行处理此文件，则可以使用以下命令获取site_name。您可以对其进行修改以获取其他属性。

代码将字符串转换为有效的xml字符串（它需要在前端使用<ul>，然后使用xpath查询来获取site_name的值：

用您的字符串（您的字符串）代替（几乎）xml字符串。

declare @xml xml
set @xml=convert(xml,'<ul>'+'*your string*')
select @xml.value('(/ul/li/strong/span[text()="site_name"]/../../span)[1]','varchar(100)')

如果要对表执行此操作：

select convert(xml,'<ul>'+att).value('(/ul/li/strong/span[text()="site_name"]/../../span)[1]','varchar(100)') as SiteName
from waterwatch_active

最后，如果您要处理多个列，例如site_name和site_code，请执行以下操作：

;with attTable as (select convert(xml,'<ul>'+att) as attXML from waterwatch_active)
select attXML.value('(/ul/li/strong/span[text()="site_name"]/../../span)[1]','varchar(100)') as SiteName,
attXML.value('(/ul/li/strong/span[text()="site_code"]/../../span)[1]','varchar(100)') as SiteCode
from attTable

将单个字段分隔/拆分为多个字段

1 个答案: