如何在一个表中插入相同的LAST_INSERT_ID（）以创建多个记录；

Question

I am programming a website, with ASP.NET, C#, as well as using MYSQL. I need to be able to record two rows with same child_id;

My problem is with this one statement, it inserts one row and skips the last.

   //data.ChldrenRecord.Service contain two records
   // babysit, and tutor
  foreach (string s in data.ChildrenRecord.Services)
  {
     query += (" INSERT INTO ServiceChildren SET service='" + s + "', child_id=LAST_INSERT_ID();");
  }

so table should look something like this

 id   service    child_id
 1    babysit    1
 2    tutor      1

I use Last_INSERT_ID() because child_id is a foreign key. I create a record in another table whose primary key is child_id. Afterwards, I use LAST_INSERT_ID() to reference that one record primary key child_id so that i may use it in my ServiceChildren table.

as it stands my table looks:

 id    service   child_id
 1     babysit   1

I think i am on the right track now. if i log directly into the database, this statement works:

  SET @last_id = LAST_INSERT_ID();
 //then insert statements
  INSERT INTO ServiceChildren(service, child_id) VALUES('babysit', @last_id);
  INSERT INTO ServiceChildren(service, child_id) VALUES('tutor', @last_id);

BUT IN MY C#, ASP.NET CODE THE LINE SET @last_id = LAST_INSERT_ID(); does not do anything, even populate tables with a prior insert statement.

Answer 1

OK, I found out my problem. I needed to place Allow User Variables=True in the connection string to be allowed to create and use @last_id .