barcode generator vb.net free Database Scripting in Software

Painting PDF417 in Software Database Scripting

Database Scripting
PDF 417 Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
PDF 417 Encoder In None
Using Barcode maker for Software Control to generate, create PDF 417 image in Software applications.
One of the most exciting features in Enterprise Manager for both junior and senior administrators is the ability to perform reverse engineering on the database. The result of this process is a script with DDL statements, which can be used to re-create all database objects. This script can be used to
PDF417 Reader In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Encoding PDF-417 2d Barcode In Visual C#
Using Barcode creation for .NET framework Control to generate, create PDF-417 2d barcode image in .NET applications.
w s s v
PDF417 Creation In .NET
Using Barcode creator for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
PDF417 Generator In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
Explore user and system database objects Back up source code Establish a source control process Transfer the complete database (or just some objects) to another server (and/or another database)
PDF417 Encoder In Visual Basic .NET
Using Barcode encoder for VS .NET Control to generate, create PDF-417 2d barcode image in VS .NET applications.
Data Matrix ECC200 Generation In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
The process of database scripting is very simple. The user selects a database in Enterprise Manager and runs Tools | Generate SQL Script. The program prompts the user to specify the objects to be scripted:
Code 128 Code Set A Creation In None
Using Barcode maker for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
UPC - 13 Generator In None
Using Barcode drawer for Software Control to generate, create GS1 - 13 image in Software applications.
6:
Barcode Drawer In None
Using Barcode creation for Software Control to generate, create bar code image in Software applications.
Encoding GTIN - 12 In None
Using Barcode printer for Software Control to generate, create UPC-A Supplement 5 image in Software applications.
Composite Transact-SQL Constructs Batches, Scripts, and Transactions
Generate USPS Confirm Service Barcode In None
Using Barcode printer for Software Control to generate, create USPS Confirm Service Barcode image in Software applications.
Bar Code Generation In Objective-C
Using Barcode drawer for iPhone Control to generate, create barcode image in iPhone applications.
On the Formatting tab, the user can decide in which format each database object is to be generated. A small preview template helps users make the right choice among several options:
Code 39 Full ASCII Printer In None
Using Barcode drawer for Online Control to generate, create Code 39 Full ASCII image in Online applications.
Barcode Generator In None
Using Barcode printer for Font Control to generate, create barcode image in Font applications.
The Options tab allows the user to specify options for supporting objects such as indexes, triggers, constraints, logins, users, roles, and permissions. The ability to specify a character set is very important for multilanguage environments.
Create Code 39 In VS .NET
Using Barcode creation for .NET framework Control to generate, create Code39 image in VS .NET applications.
ANSI/AIM Code 39 Encoder In None
Using Barcode maker for Microsoft Excel Control to generate, create Code 39 Full ASCII image in Office Excel applications.
SQL Server 2000 Stored Procedure Programming
GS1 - 13 Recognizer In VB.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in VS .NET applications.
EAN13 Generation In None
Using Barcode encoder for Microsoft Word Control to generate, create European Article Number 13 image in Word applications.
TIP: If you want to be able to open a script file from regular editors (that do not support Unicode) such as Notepad, you should select Windows Text (ANSI) as your file format.
The reason you are generating script and the use that you have planned for it will influence the decision to generate a single file (for example, when you want to transfer the object) or one file per object (for example, when you want to use scripts to establish source code control).
TIP: Use database scripting to explore the sample databases delivered with this book and the sample and system databases published with SQL Server. Exploration of other styles and methods in coding will help you to gain knowledge and build experience.
THE TRANSACTION CONCEPT
Even from the very name of the Transact-SQL language, you can conclude that transactions play a major role in SQL Server. They are an important mechanism for enforcing the consistency and integrity of the database.
6:
Composite Transact-SQL Constructs Batches, Scripts, and Transactions
Transactions are the smallest units of work in SQL Server. To qualify a unit of work as a transaction, it must satisfy the four criteria often referred to as the ACID test (Atomicity, Consistency, Isolation, Durability):
Atomicity All data changes must be completed successfully, or none of them will be written permanently to the database. Consistency After a transaction, the database must be left in a consistent state. All rules must be applied during processing to ensure data integrity. All constraints must be satisfied. All internal data structures must be left in an acceptable state. Isolation Changes to the database made by a transaction must not be visible to other transactions until the transaction is complete. Before the transaction is committed, other transactions should see the data only in the state it was in before the transaction. Durability Once a transaction is completed, changes must not revert even in the case of a system failure.
Autocommit Transactions
In fact, every Transact-SQL statement is a transaction. When it is executed, it either finishes successfully or is completely abandoned. To illustrate this, let s try to delete all records from EqType table. Take a look at the following diagram:
SQL Server 2000 Stored Procedure Programming
A foreign key relationship exists between the EqType and Equipment tables. The foreign key will prevent the deletion of records in the EqType table that are referenced by records in the Equipment table. Let s try to delete them anyway. You can see the result of such an attempt in Figure 6-2. Two Select statements that will count the number of records in EqType are placed around the Delete statement. As expected, the Delete statement is aborted because of the foreign key. The count of records before and after the Delete statement is the same, which confirms that all changes made by the Delete statement were canceled. So the database remains in the state that it was in before the change was initiated. If there were no errors, SQL Server would automatically commit the transaction (that is, it would record all changes) to the database. This kind of behavior is called autocommit.
Figure 6-2.
Copyright © OnBarcode.com . All rights reserved.