Question

我在列中有一个长字符串作为员工的全名，我想用名字，中间名和姓氏打破它。例如我有Andrade, Maria Sandra（lname，（空格）fname（空格）mname）打破就好了 fname = Maria，lname = Andrade和Sandra这样的中间名。

我的专栏通常有lname，fname。

我可以分割lname，但不能正确分解fname和mname

  SELECT  EmployeeName as [full name  ], SUBSTRING( EmployeeName,CHARINDEX(',',EmployeeName)+1,LEN(EmployeeName)) as[First name ]
  ,SUBSTRING( EmployeeName,0,CHARINDEX(',',EmployeeName)) [Last Name]
 , SUBSTRING( SUBSTRING( EmployeeName,CHARINDEX(',',EmployeeName)+1,LEN(EmployeeName)),CHARINDEX(' ',EmployeeName),LEN (SUBSTRING( EmployeeName,CHARINDEX(',',EmployeeName),LEN(EmployeeName)))) as[Middle  name ]
 FROM test$`

Answer 1

以下是您应该对数据进行规范化的完美原因。

declare @table table(thename varchar(500))
insert into @table
values
('Andrade, Maria Sandra'),
('Andrade, Maria'),
('Andrade, Maria Sandra OhSnap')

select
    left(thename,CHARINDEX(',',thename) - 1) as LastName
    ,substring(thename,charindex(' ',thename),case when charindex(' ',thename) + charindex(' ',reverse(thename)) > len(thename) then charindex(' ',reverse(thename))  else len(thename) - (charindex(' ',thename) + charindex(' ',reverse(thename))) + 1 end) as FirstName
    ,case when charindex(' ',thename) + charindex(' ',reverse(thename)) - 1 = len(thename) then null else right(thename,charindex(' ',reverse(thename))) end as MiddleName
from @table

使用子字符串打破列

1 个答案: