Question

我使用PDOException: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in lock_may_be_available() (line 167 of /home/..../public_html/page/includes/lock.inc).命令将一些值插入表中，然后我将其插入值INSERT。现在我想使用OUTPUT命令通过其id选择插入的行我使用下面的代码，但它似乎不起作用。

SELECT

Answer 1

您还可以使用output parameter代替select将行返回给您的应用。

如果Id生成了sequence，请使用next value for：

create procedure [dbo].[usp_UserRegistration] (
    @Name varchar(100),
    @Contact varchar(20),
    @dob varchar(20),
    @MailAddress varchar(500),
    @Id int output
) as
begin;
set nocount, xact_abort on;
  begin try;
    begin tran
      /* your critiera for a new record here */
      select  @Id = Id
        from  dbo.Customer with (updlock, serializable)
        where Name = @Name
          and dob = @dob;
      if @@rowcount = 0
      begin;
        set @Id = next value for dbo.IdSequence /* with your Sequence name here */
        insert into dbo.Customer (Id, Name, Contact, dob, MailAddress)
        values (@Id, @Name, @Contact, @dob, @MailAddress ); 
      end;
    commit tran;
  end try
  begin catch;
    if @@trancount > 0 
      begin;
        rollback transaction;
        throw;
      end;
  end catch;
go

如果您的Id是identity列，请使用scope_identity()。

There is a big difference between @@identity, scope_identity(), and ident_current()

参考文献：

序列：

在SQL Server存储过程中选择插入的行

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