What are the best practices in writing a sql stored procedure [closed]

Answer 1

Here's some code to prove that there are no multilevel ROLLBACKs on SQL Server and it illustrates how transactions are handled:

BEGIN TRAN;

    SELECT @@TRANCOUNT AS after_1_begin;

BEGIN TRAN;

    SELECT @@TRANCOUNT AS after_2_begin;

COMMIT TRAN;

    SELECT @@TRANCOUNT AS after_1_commit;

BEGIN TRANSACTION;

    SELECT @@TRANCOUNT AS after_3_begin;

ROLLBACK TRAN;

    SELECT @@TRANCOUNT AS after_rollback;