TSQL如何在xml列中选择具有技能的员工 [英] TSQL How to select employee with skills in xml column

问题描述

在如下表模式中

CREATE TABLE [dbo].[Employee](
    [EmployeeId] [uniqueidentifier] NOT NULL,
    [Name] [nvarchar](50) NOT NULL,
    [Location] [nvarchar](50) NOT NULL,
    [Skills] [xml] NOT NULL
 CONSTRAINT [PK_Employee] PRIMARY KEY CLUSTERED 

• 假设 Skills 列中保存的 xml 如下所示，我如何让员工拥有 C#(不区分大小写)编程技能.

  • How would i get Employees having C#(case insensitive) programming skills assuming the xml saved in the Skills columns is as below.

    你能对其他函数的建议能帮助我过滤、排序时使用xml数据类型列

    Could you advice on other functions would help me filter, sort when using xml data type columns

    C#ASP.NETVB.NET

    推荐答案

    比较区分大小写，因此您需要同时与 c# 和 C# 进行比较.在 SQL Server 2008 中，您可以使用 大写.

    The comparison is case sensitive so you need to compare against both c# and C#. In SQL Server 2008 you can use upper-case.

    declare @T table
    (
      ID int identity,
      Skills XML
    )
    
    insert into @T values
    ('<Skills><Skill>C#</Skill><Skill>ASP.NET</Skill><Skill>VB.NET</Skill></Skills>')
    insert into @T values
    ('<Skills><Skill>CB.NET</Skill><Skill>ASP.NET</Skill><Skill>c#</Skill></Skills>')
    insert into @T values
    ('<Skills><Skill>F#</Skill><Skill>ASP.NET</Skill><Skill>VB.NET</Skill></Skills>')
    
    select ID
    from @T
    where Skills.exist('/Skills/Skill[contains(., "C#") or contains(., "c#")]') = 1
    

    结果:

    ID
    -----------
    1
    2
    

    更新:

    这也行.

    select T.ID
    from @T as T
      cross apply T.Skills.nodes('/Skills/Skill') as X(N)
    where X.N.value('.', 'nvarchar(50)') like '%C#%'
    

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