向 table 值函数添加条件

Question

我创建了这个函数，将投资者姓名分为第一名、中间名和最后一名。但是我想添加一个条件，如果中间名没有空格，则在单独的列中显示数字 0，如果中间名有空格，则显示 1，我该怎么做？

这是我已经创建的函数：

ALTER function [dbo].[saveinvestornames]()
returns @investorsname table ( investor_name nvarchar(300),first_name nvarchar(300), middle_name nvarchar(300),last_name nvarchar(300) )
as
begin
    insert into @investorsname
        select 
            investor_name,    
            SUBSTRING(investor_name, CHARINDEX(', ', investor_name) + 2, CASE WHEN CHARINDEX(' ', investor_name, CHARINDEX(', ', investor_name) + 2) = 0 THEN LEN(investor_name) + 1 ELSE CHARINDEX(' ', investor_name, CHARINDEX(', ', investor_name) + 2) END - CHARINDEX(', ', investor_name) - 2)as FirstName,            
            RTRIM(LTRIM(REPLACE(REPLACE(investor_name,SUBSTRING(investor_name , 1, CHARINDEX(' ', investor_name) -1),''),REVERSE( LEFT( REVERSE(investor_name), CHARINDEX(' ', REVERSE(investor_name))-1 ) ),'')))as MiddleName,    
            right(investor_name, CHARINDEX(' ', REVERSE(investor_name))) as LastName
        from investornames;

    return;
end;

Answer 1

只需将您的程序更改为：

ALTER function [dbo].[saveinvestornames]()
returns @investorsname table ( investor_name nvarchar(300),first_name nvarchar(300), middle_name nvarchar(300),last_name nvarchar(300), middleNameSpace bit )
as
begin
    insert into @investorsname
        select first_name, middle_name, last_name,
               case when len(middle_name) - len(replace(middle_name, ' ', '')) = 0 then 0 else 1 end
        from (
            select 
                investor_name,    
                SUBSTRING(investor_name, CHARINDEX(', ', investor_name) + 2, CASE WHEN CHARINDEX(' ', investor_name, CHARINDEX(', ', investor_name) + 2) = 0 THEN LEN(investor_name) + 1 ELSE CHARINDEX(' ', investor_name, CHARINDEX(', ', investor_name) + 2) END - CHARINDEX(', ', investor_name) - 2)as FirstName,            
                RTRIM(LTRIM(REPLACE(REPLACE(investor_name,SUBSTRING(investor_name , 1, CHARINDEX(' ', investor_name) -1),''),REVERSE( LEFT( REVERSE(investor_name), CHARINDEX(' ', REVERSE(investor_name))-1 ) ),'')))as MiddleName,    
                right(investor_name, CHARINDEX(' ', REVERSE(investor_name))) as LastName
            from investornames;
        ) a
    return;
end;

它只是通过比较替换space后该列的长度来检查middle_name中有多少space。

向 table 值函数添加条件

Add a condition to a table-valued function

sql

sql-server

sql-server-2017