根据参数更改值更新其他行 SQL 2012 ASP.NET

Question

我有以下 SQL 由 ASP.NET C# 形式的更新过程触发的更新查询..

 UPDATE 
[Data_TEST] SET  
 [Contact Phone] = @Contact_Phone
, [Contact] = @Contact
, [Contact Info Changed] = @Contact_Info_Changed

WHERE
 (([Contact Phone] = @original_Contact_Phone) OR
([Contact Phone] IS NULL AND 
@original_Contact_Phone IS NULL)) AND 
(([Contact] = @original_Contact) OR
([Contact] IS NULL AND 
@original_Contact IS NULL)) 
(([Contact Info Changed] = @original_Contact_Info_Changed) OR
([Contact Info Changed] IS NULL AND 
@original_Contact_Info_Changed IS NULL))

我想将 [联系信息已更改] 的值更改为 'Y' 如果 [联系人 Phone] 或 [联系人] 在更新过程中发生了变化。

Answer 1

你可以创建一个触发器来检查这些值是否更新所以

 create trigger trg_change on Data_Test
  after update
  as
 begin
 if(select [Contact Phone] from deleted)!=(select [Contact Phone] from inserted)
or (select Contact from deleted)!=(select Contact from inserted)
 begin
 update Data_Test
set 
[Contact Info Changed]='y'
end
end

Answer 2

如果你有主键或唯一键，那显然你应该有你可以按照我的脚本

IF OBJECT_ID('tempdb..#Data_TEST') IS NOT NULL
  DROP TABLE #Data_TEST

create table #Data_TEST
(
  ID int,
  [Contact Phone] varchar(10),
  [Contact] varchar(10),
  [Contact Info Changed] char(1)
)

insert into #Data_TEST values 
(1, 'Phone1', 'Contact1', 'N'),
(2, 'Phone2', 'Contact2', 'N')

declare @Contact_Phone varchar(10) = 'Phone2'
declare @Contact varchar(10) = 'Contact2'

UPDATE #Data_TEST
SET  
  [Contact Phone] = @Contact_Phone
, [Contact] = @Contact
, [Contact Info Changed] = 
  case 
    when 
      @Contact = (select [Contact] from #Data_TEST AS dt2 where dt2.ID = #Data_TEST.ID) AND 
      @Contact_Phone = (select [Contact Phone] from #Data_TEST AS dt2 where dt2.ID = #Data_TEST.ID)
    then 'N'
    else 'Y'
  end

假设您的 table 为 #Data_TEST 并假设您的 Pk/UK 为 ID

此脚本将参数值与您当前在 table

中的值进行比较

更新前数据

+----+---------------+----------+----------------------+
| ID | Contact Phone | Contact  | Contact Info Changed |
+----+---------------+----------+----------------------+
|  1 | Phone1        | Contact1 | N                    |
|  2 | Phone2        | Contact2 | N                    |
+----+---------------+----------+----------------------+

更新后的数据

+----+---------------+----------+----------------------+
| ID | Contact Phone | Contact  | Contact Info Changed |
+----+---------------+----------+----------------------+
|  1 | Phone2        | Contact2 | Y                    |
|  2 | Phone2        | Contact2 | N                    |
+----+---------------+----------+----------------------+

我删除了你的 where 子句，因为它有语法错误，但记得将它添加到你的最终脚本中。

根据参数更改值更新其他行 SQL 2012 ASP.NET

Update Additional rows based on parameter change value SQL 2012 ASP.NET

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