Question

我想将excel（数据）文本“复制”到columns函数。基本上我有一个字符串列，我想根据特定的分隔符将其拆分为多个列。

 declare @t table (
    id int,
    name varchar(50)
    )

    insert into @t values (1,'abcd.ef.g')
    insert into @t values (2,'ab.cdef.ghi')
    insert into @t values (3,'a..d')
    insert into @t values (4,'a')

    select * from @t

    id          name
    ----------- --------------------------------------------------
    1           abcd.ef.g
    2           ab.cdef.ghi
    3           a..d
    4           a

    --I would like to get result

    id          name1   name2   name3
    ----------- --------------------------------------------------
    1           abcd    ef      g
    2           ab      cdef    ghi
    3           a       (NULL)  d
    4           a       (NULL)  (NULL)

感谢

Answer 1

 declare @t table (id int,name varchar(50))

    insert into @t values (1,'abcd.ef.g')
    insert into @t values (2,'ab.cdef.ghi')
    insert into @t values (3,'a..d')
    insert into @t values (4,'a');



WITH Split_Fields (ID, xmlfields)
AS
(
    SELECT ID ,
    CONVERT(XML,'<Fields><field>'  
    + REPLACE(name,'.', '</field><field>') + '</field></Fields>') AS xmlfields
      FROM @t
)

 SELECT ID      
 ,xmlfields.value('/Fields[1]/field[1]','varchar(100)') AS Field1    
 ,xmlfields.value('/Fields[1]/field[2]','varchar(100)') AS Field2
 ,xmlfields.value('/Fields[1]/field[3]','varchar(100)') AS Field3    
 ,xmlfields.value('/Fields[1]/field[4]','varchar(100)') AS Field4
 ,xmlfields.value('/Fields[1]/field[5]','varchar(100)') AS Field5
 FROM Split_Fields

结果

╔════╦════════╦════════╦════════╦════════╦════════╗
║ ID ║ Field1 ║ Field2 ║ Field3 ║ Field4 ║ Field5 ║
╠════╬════════╬════════╬════════╬════════╬════════╣
║  1 ║ abcd   ║ ef     ║ g      ║ NULL   ║ NULL   ║
║  2 ║ ab     ║ cdef   ║ ghi    ║ NULL   ║ NULL   ║
║  3 ║ a      ║        ║ d      ║ NULL   ║ NULL   ║
║  4 ║ a      ║ NULL   ║ NULL   ║ NULL   ║ NULL   ║
╚════╩════════╩════════╩════════╩════════╩════════╝

sql基于分隔符

1 个答案:

结果