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  • for mxl path

    废话不多说,直接上例子 简单明了

    create  table tb_class
    (
        classId int ,
        className varchar(10)
    )
    go
    insert into tb_class values(1,'一班')
    insert into tb_class values(2,'二班')
    insert into tb_class values(3,'三班')
    go
    create table tb_student
    (
        classId int,
        stuId varchar(5),
        stuName varchar(10)
    )
    go
    insert into tb_student values(1,'1001','张三')
    insert into tb_student values(1,'1002','李四')
    insert into tb_student values(1,'1003','王二')
    insert into tb_student values(1,'1004','麻子')
    insert into tb_student values(2,'2001','王尼玛')
    insert into tb_student values(2,'2002','唐马儒')
    insert into tb_student values(2,'2003','张全蛋')
    go
    select * from tb_class
    select * from tb_student

    1.

    select stuname from tb_student for xml path

     效果

    <row>
      <stuname>张三</stuname>
    </row>
    <row>
      <stuname>李四</stuname>
    </row>
    <row>
      <stuname>王二</stuname>
    </row>
    <row>
      <stuname>麻子</stuname>
    </row>
    <row>
      <stuname>王尼玛</stuname>
    </row>
    <row>
      <stuname>唐马儒</stuname>
    </row>
    <row>
      <stuname>张全蛋</stuname>
    </row>

    2

    select stuname from tb_student for xml path('')

    效果

    <stuname>张三</stuname>
    <stuname>李四</stuname>
    <stuname>王二</stuname>
    <stuname>麻子</stuname>
    <stuname>王尼玛</stuname>
    <stuname>唐马儒</stuname>
    <stuname>张全蛋</stuname>

    3  

    select stuname+',' from tb_student for xml path('')

    效果
    张三,李四,王二,麻子,王尼玛,唐马儒,张全蛋,

    4

    select LEFT(stuName, LEN(stuName)-1) from (
    select (
    select stuname+',' from tb_student for xml path('')) as stuName ) a

    张三,李四,王二,麻子,王尼玛,唐马儒,张全蛋

    5

    select '可以拼接字符串,'+LEFT(stuName, LEN(stuName)-1) from (
    select (
    select stuname+',' from tb_student for xml path('')) as stuName ) a

    效果:可以拼接字符串,张三,李四,王二,麻子,王尼玛,唐马儒,张全蛋

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  • 原文地址:https://www.cnblogs.com/yuanyanyan/p/6016724.html
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