barcode generator vb.net free Composite Transact-SQL Constructs Batches, Scripts, and Transactions in Software

Painting PDF417 in Software Composite Transact-SQL Constructs Batches, Scripts, and Transactions

Composite Transact-SQL Constructs Batches, Scripts, and Transactions
Reading PDF 417 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
PDF417 Creation In None
Using Barcode maker for Software Control to generate, create PDF 417 image in Software applications.
Transactions are completed with regular Commit or Rollback statements. The following stored procedure updates two tables in a local database and then updates information in a remote database using a remote stored procedure:
Scanning PDF 417 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
PDF417 Creator In Visual C#
Using Barcode encoder for .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
Alter Procedure prClearLeaseShedule_distributed -- Set value of Lease of all equipment associated to 0 -- Set total amount of Lease Schedule to 0. -- notify lease company that lease schedule is completed @intLeaseScheduleId int As Declare @chvLeaseNumber varchar(50), @intErrorCode int -- Verify that lease has expired If GetDate() < (Select EndDate From LeaseSchedule Where ScheduleId = @intLeaseScheduleId) Raiserror ('Specified lease schedule has not expired yet!', 16,1) If @@Error <> 0 Begin Print 'Unable to eliminate lease amounts from the database!' Return 50000 End -- get lease number Select @chvLeaseNumber = Lease.LeaseNumber From Lease Inner Join LeaseSchedule On Lease.LeaseId = LeaseSchedule.LeaseId Where (LeaseSchedule.ScheduleId = @intLeaseScheduleId) Begin Distributed Transaction -- Set value of Lease of all equipment associated to 0 Update Inventory Set Lease = 0 Where LeaseScheduleId = @intLeaseScheduleId If @@Error <> 0 Goto PROBLEM
Generate PDF417 In .NET
Using Barcode creation for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
Print PDF417 In VS .NET
Using Barcode encoder for .NET Control to generate, create PDF417 image in .NET applications.
SQL Server 2000 Stored Procedure Programming
PDF 417 Maker In Visual Basic .NET
Using Barcode generation for VS .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
Creating USS Code 128 In None
Using Barcode maker for Software Control to generate, create Code 128 Code Set C image in Software applications.
-- Set total amount of Lease Schedule to 0 Update LeaseSchedule Set PeriodicTotalAmount = 0 Where ScheduleId = @intLeaseScheduleId If @@Error <> 0 Goto PROBLEM -- notify lease vendor Exec @intErrorCode = lease_srvr.LeaseShedules..prLeaseScheduleComplete @chvLeaseNumber, @intLeaseScheduleId If @intErrorCode <> 0 GoTo PROBLEM Commit Transaction Return 0 PROBLEM: print 'Unable to complete lease schedule!' Rollback Transaction Return 50000
ECC200 Generation In None
Using Barcode encoder for Software Control to generate, create Data Matrix image in Software applications.
Generate EAN-13 Supplement 5 In None
Using Barcode printer for Software Control to generate, create UPC - 13 image in Software applications.
Apart from a reference to the remote stored procedure, the only thing that the developer needed to do was to use the Distributed keyword to start the transaction. Everything else was managed by MS DTC.
Painting Barcode In None
Using Barcode creation for Software Control to generate, create barcode image in Software applications.
UPC Code Creator In None
Using Barcode creator for Software Control to generate, create GS1 - 12 image in Software applications.
Typical Errors
Print Identcode In None
Using Barcode maker for Software Control to generate, create Identcode image in Software applications.
Bar Code Creator In None
Using Barcode generator for Online Control to generate, create barcode image in Online applications.
Transactions are a powerful weapon in the hands of a programmer, but improper use can cause substantial damage. I will try to forewarn you of some typical problems.
UPC Code Creator In Java
Using Barcode creator for BIRT reports Control to generate, create UPC-A image in BIRT applications.
GS1-128 Maker In Java
Using Barcode encoder for Eclipse BIRT Control to generate, create EAN 128 image in BIRT applications.
A Never Ending Story
Make UPC - 13 In VS .NET
Using Barcode maker for Reporting Service Control to generate, create EAN13 image in Reporting Service applications.
UPC - 13 Encoder In .NET Framework
Using Barcode generator for VS .NET Control to generate, create GTIN - 13 image in VS .NET applications.
The worst thing that you can do is to open a transaction and then forget to close it. All changes sent to the database through that connection will become part of that transaction; resources normally
1D Barcode Maker In VB.NET
Using Barcode creator for VS .NET Control to generate, create 1D image in .NET framework applications.
Data Matrix 2d Barcode Recognizer In Visual Studio .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications.
6:
Composite Transact-SQL Constructs Batches, Scripts, and Transactions
released at the end of a transaction are held indefinitely; other users cannot access resources; and eventually, your server chokes.
Spanning a Transaction over Batches
A transaction can span batches. SQL Server counts transactions over the connection, so it is legal to issue two batches like this over one connection:
Begin Transaction update Inventory set Lease = 0 where LeaseScheduleId = 141 Go update LeaseSchedule Set PeriodicTotalAmount = 0 where ScheduleId = 141 Commit Transaction Go
However, I cannot think of any justification for doing so, and you significantly increase the probability of error. For example, you could easily forget to finish the transaction.
Named Transactions and Savepoints
Transaction names and savepoint names do not bring much value to your solutions, but they do bring additional risks. There are too many rules that you need to keep in mind. It is best not to use them at all.
Rollback Before Begin
Sometimes you might set your error handling so that all errors that occur in a stored procedure are treated in the same way. Naturally,
SQL Server 2000 Stored Procedure Programming
you will include a statement to roll back the transaction. If an error occurs before the transaction starts, the stored procedure will jump to the error handling code and another error will occur:
Create Procedure prClearLeaseShedule_1 -- Set value of Lease of all equipment associated -- with expired Lease Schedule to 0 -- Set total amount of Lease Schedule to 0. @intLeaseScheduleId int As -- Verify that lease has expired If GetDate() < (select EndDate from LeaseSchedule where ScheduleId = @intLeaseScheduleId) raiserror ('Specified lease schedule has not expired yet!', 16,1) -- If error occurs here, -- server will execute Rollback before transaction is started! if @@Error <> 0 goto PROBLEM Begin Transaction -- Set value of Lease of all equipment associated -- with expired Lease Schedule to 0 update Inventory set Lease = 0 where LeaseScheduleId = @intLeaseScheduleId if @@Error <> 0 goto PROBLEM -- Set total amount of Lease Schedule to 0 update LeaseSchedule Set PeriodicTotalAmount = 0 where ScheduleId = @intLeaseScheduleId if @@Error <> 0 goto PROBLEM commit transaction return 0
6:
Copyright © OnBarcode.com . All rights reserved.