Split and save in SQL Server

Question

My procedure is:

CREATE PROCEDURE [dbo].[sp_SavePost]
    @PostTitle NVARCHAR(max),
    @PostDescription NVARCHAR(max),
    @PostDate DATETIME,
    @Author NVARCHAR(100),
    @Tag NVARCHAR(250), --it bring c#,asp.net,mvc
    @Category NVARCHAR(250)
AS
BEGIN
   INSERT INTO [dbo].[ForumPost](PostTitle, PostDescription, PostDate,
                                 Author, Tag, Category)
   VALUES(@PostTitle, @PostDescription, @PostDate,
          @Author, @Tag, @Category)
END

Table [dbo].[ForumPost] has postid which is auto increment. There is another tables called Tag. In a same procedure I want to insert a value into Tag table which has column postid and tag. But unable to insert a value in tag table. Means if postid=2 I want a result like this.

Table tag

postid | tag
------------
2      | c#
2      | asp.net
2      |  mvc

Thanks.

Answer 1

You need to get the latest inserted identity value and then use it in your second insert:

CREATE PROCEDURE [dbo].[sp_SavePost]
  .....
AS
BEGIN
   INSERT INTO [dbo].[ForumPost](PostTitle, PostDescription, PostDate,
                                 Author, Tag, Category)
   VALUES(@PostTitle, @PostDescription, @PostDate,
          @Author, @Tag, @Category)

   -- declare variable to hold newly inserted IDENTITY value
   DECLARE @NewPostID INT

   -- fetch the newly inserted IDENTITY value
   SELECT @NewPostID = SCOPE_IDENTITY()

   -- use that value in the next INSERT into the "Tag" table
   INSERT INTO dbo.Tag(PostId, ......)
   VALUES(@NewPostID, .......)
END

As a side-note: you should not use the sp_ prefix for your stored procedures. That's a prefix that Microsoft has reserved for its own use. There is a risk this will not work properly, or that it might cause slowdowns. I would avoid the sp_ prefix - use something like proc_ or no prefix that all...