Question

我有以下数据

Name        Description
a-c-v       ad-cfd-gft-anonmymous data-typegf
t-r         tsjdg-dgdt-testing the data-check the test-type
f           test-1234-tlelephone

我需要sql查询，它会将结果显示为

ad-cfd-gft
tsjdg-dgdt
test

根据名称中的冒号，我应该从描述中得到结果。我正在使用sql server 2008，请你帮忙编辑了我的数据

Answer 1

select  name
       ,cast (Description.query('/r/e[position() <= sql:column("tokens_num")]/text()') as varchar(max)) as Description

from   (select  name
               ,len(name) - len(replace(name,'-','')) + case when name = '' then 0 else 1 end  as tokens_num
               ,cast ('<r><e>' + replace(Description,'-','</e><e>-') + '</e></r>' as xml)      as Description

        from    t
        ) t

+-------+-------------+
| name  | Description |
+-------+-------------+
| a-c-v | ad-cfd-gft  |
+-------+-------------+
| t-r   | tsjdg-dgdt  |
+-------+-------------+
| f     | test        |
+-------+-------------+

演示（更容易关注数据样本）

declare @t table (Name varchar(100),Description varchar(100))

insert into @t values 

     (''                    ,'It''s-a-show-about-nothing')
    ,('Sting'               ,'Englishman-In-New-York')
    ,('Paul-Simon'          ,'The-Sound-Of-Silence')
    ,('Andrew-Lloyd-Webber' ,'The-Phantom-Of-The-Opera')



select      name            
           ,name_tokens_num
           ,Description                                                                                                 as original_Description
           ,cast (Description_xml.query('/r/e[position() <= sql:column("name_tokens_num")]/text()') as varchar(max))    as new_Description

from       (select      name
                       ,Description
                       ,len(name) - len(replace(name,'-','')) + case when name='' then 0 else 1 end  as name_tokens_num
                       ,cast ('<r><e>' + replace(Description,'-','</e><e>-') + '</e></r>' as xml)    as Description_xml

            from        @t
            ) t

+---------------------+-----------------+--------------------------+-----------------+
| name                | name_tokens_num | original_Description     | new_Description |
+---------------------+-----------------+--------------------------+-----------------+
|                     | 0               | It's-a-show-about-nothing|                 |
+---------------------+-----------------+--------------------------+-----------------+
| Sting               | 1               | Englishman-In-New-York   | Englishman      |
+---------------------+-----------------+--------------------------+-----------------+
| Paul-Simon          | 2               | The-Sound-Of-Silence     | The-Sound       |
+---------------------+-----------------+--------------------------+-----------------+
| Andrew-Lloyd-Webber | 3               | The-Phantom-Of-The-Opera | The-Phantom-Of  |
+---------------------+-----------------+--------------------------+-----------------+

计算col1中的冒号，并在col2中的冒号总数之后修剪数据

1 个答案: