使用 CAST 函数的参数化更新查询

Question

我正在使用如下更新查询：

 UPDATE PeopleTable 
     SET firstname = CAST(REPLACE(CAST(firstname as nvarchar(max)), 'John', 'ReplacedFirstName') as ntext)

我想对几个名字做同样的事情，比如 "Dave, Tom, Harry, Rick, Nick"

如何正确执行此操作？

我试过这样的事情：

 create procedure proc2
 @sp varchar(25)
 as
 select UPDATE PeopleTable SET first name = CAST(REPLACE(CAST(BODY as
       nvarchar(max)), searchString = @sp,'ReplacedFirstName') as ntext)
 go


 declare @sp varchar(25)

 //I want to loop here and execute the stored proc for a list of names
 set @sp = 'name'     
 exec proc2 @sp

Answer 1

您可以将 cte 与值构造一起使用

with t as (
       select *
       from ( values ('John', 'ReplacedFirstName'), ('Dave', 'ReplacedFirstName'),
                      . . .
            ) tt (firstname, ReplacedFirstName)
 )

update p 
      set p.firstname = t.ReplacedFirstName
from PeopleTable p inner join
     t 
     on t.firstname = p.firstname;

Answer 2

    PreparedStatement pstmt = null;

    String query = "UPDATE PeopleTable SET firstname = CAST(REPLACE(CAST(firstname as nvarchar(max)), ? ,'ReplacedFirstName') as ntext)";

    pstmt = conn.prepareStatement(query);
    for(String s: myList) {

    pstmt.setString(1, s);

    pstmt.addBatch();

    }

    pstmt.executeUpdate();

使用 CAST 函数的参数化更新查询

Parametrized update query with CAST function

sql

sql-server

prepared-statement

parameterized-query