sql - SQL Server 中的游标

Question

我尝试了很多代码，但没有用。

所以，我需要的是为只有完整名称的表设置一个游标:

create database DB01

use DB01

create table Clients
(
     complete_name varchar(50)
)

insert into Clients 
values ('Ralph Van Beethoven')

没问题。

现在，我有另一个数据库，其中我必须将我的名字分成“姓名”、“名字”和“第二姓氏”，因此它必须如下所示:

• 姓名:拉尔夫
• 名字:Van
• 第二姓氏:贝多芬

代码:

create database DB02

use DB02

create table Clients_Details
(
     Name varchar(50),
     First_Last_Name varchar(50),
     Second_Last_Name varchar(50)
)

真正的事情来了。我需要一个游标来将 DB01 中的完整名称拆分出来并将其插入到 DB02 中，我有以下代码:

Declare @name as varchar(50)
Declare cClients cursor for Select complete_name from Clients

Declare @temporal table 
(
    tName varchar(50),
    tFLName varchar(50),
    tSLName varchar(50)
)

Open cClients

Fetch cClients into @name

While (@@fetch_status = 0 )
Begin
    Insert into @temporal
        Select 
            case charindex(' ', @name) 
               when 0 then @name 
               else left(@nname, charindex(' ', @name) - 1) 
            end as tFLName,   
            case charindex(' ', @name) 
               when 0 then null 
               else right(@nname, len(@name) - charindex(' ', @nombre)) 
            end as tSLName
        from 
            Clients

        Insert into BD02.dbo.Clients_Details 
            select tName, tFLName, tSLName 
            from @temporal

    Fetch cClientes into @namecursor
End

Close cClients
Deallocate cClients

它抛出一个错误

The name of the column or the specified column do not match with the definition

所以我猜测我的错误在 charindex 中，因为它只保存了名字和第二个姓氏，但我不太确定现在该怎么做。

有人可以帮助我吗？

Answer 1

首先，您不需要光标来执行此操作

Insert into BD02.dbo.Clients_Details(tName,tFLName,tSLName)
SELECT NAME= Reverse(Parsename(Replace(Reverse(complete_name), ' ', '.'), 1)),
       First_Last_Name= Reverse(Parsename(Replace(Reverse(complete_name), ' ', '.'), 2)),
       Second_Last_Name= Reverse(Parsename(Replace(Reverse(complete_name), ' ', '.'), 3))
FROM   Clients 

结果

╔═══════╦═════════════════╦══════════════════╗
║ NAME  ║ First_Last_Name ║ Second_Last_Name ║
╠═══════╬═════════════════╬══════════════════╣
║ Ralph ║ Van             ║ Beethoven        ║
╚═══════╩═════════════════╩══════════════════╝

给你的教授(不推荐)

DECLARE @name AS VARCHAR(50)
DECLARE cClients CURSOR FOR
  SELECT complete_name
  FROM   Clients

OPEN cClients
FETCH cClients INTO @name

WHILE ( @@FETCH_STATUS = 0 )
  BEGIN
      INSERT INTO Clients_Details
      SELECT NAME= Reverse(Parsename(Replace(Reverse(@name), ' ', '.'), 1)),
             First_Last_Name= Reverse(Parsename(Replace(Reverse(@name), ' ', '.'), 2)),
             Second_Last_Name= Reverse(Parsename(Replace(Reverse(@name), ' ', '.'), 3))

      FETCH cClients INTO @name
  END

CLOSE cClients

DEALLOCATE cClients