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OVERVIEW OF TRANSACTION MANAGEMENT
OVERVIEW OF TRANSACTION MANAGEMENT

... (c) Isolation ensures that a transaction can run independently, without considering any side effects that other concurrently running transactions might have. When a database interleaves transaction actions for performance reasons, the database protects each transaction from the effects of other transa ...
SQL - WISE Research Group
SQL - WISE Research Group

... int. Integer (a finite subset of the integers that is machine-dependent). smallint. Small integer (a machine-dependent subset of the integer domain type). numeric(p,d). Fixed point number, with user-specified precision of p digits, with n digits to the right of decimal point. real, double precision. ...
Slide 1
Slide 1

... • Remote Copy, Create, Delete, List files • Direct connection to database provides high performance ...
I Agree - FactSet
I Agree - FactSet

... download the bundles specified and extract and load the text files needed to update the tables if required. The Loader constructs and executes load statements based on data file and table structures. The Loader maintains detailed information on the sequence of data files applied to tables. This enab ...
Flashback Technologies
Flashback Technologies

Introduction to LINQ - Ganesan Muthiah's Blog
Introduction to LINQ - Ganesan Muthiah's Blog

...  LINQ queries don't execute until they must  Retrieve specific values  Iterate through the collection  Perform an operation ...
lesson20 - SCF Faculty Site Homepage
lesson20 - SCF Faculty Site Homepage

... • You use replication to put copies of the same data at different locations throughout the enterprise. • Common reasons to replicate are: – To move data closer to the user. – To reduce locking conflicts when multiple sites want to work with the same data. – To allow site autonomy so each location ca ...
Informatica PowerCenter - 9.x. - Partitioning Oracle Sources in
Informatica PowerCenter - 9.x. - Partitioning Oracle Sources in

Data Access Objects and Visual Basic
Data Access Objects and Visual Basic

Special Interest Activity
Special Interest Activity

... login to PostgreSQL, which should have been created along with your PostgreSQL installation and which will be used by TrioExplorer to create new user roles and database instances. ◦ TrioExplorer should now be reachable from your browser using http://localhost:8080/. For new users can now press ‘Crea ...
PinkBook3-2 - Department Of Computing
PinkBook3-2 - Department Of Computing

... If so, then type in exactly what appears in the box. But note that each line starts with a prompt such as SQL> or 2 or 3 which the computer displays and which you don’t type. Be sure to press the Return key at the end of each line of input. Don’t allow yourself to fall behind. Each set of exercises ...
CSIS0402 System Architecture Distributed Computing
CSIS0402 System Architecture Distributed Computing

... Read committed transactions: only data committed to the DB may be read, can perform nonrepeatable and phantom reads Repeatable read transactions: committed, repeatable reads as well as phantom reads are allowed, nonrepeatable reads are not allowed Serializable transactions: only committed, repeatabl ...
Session3_Module5
Session3_Module5

... index operations and locking options. The ALTER INDEX statement is used to reorganize, disable and rebuild an index. SQL Server 2005 allows non-key columns to be included in nonclustered indexes and allows you to create XML indexes on the XML columns in the table. The various methods to optimize ind ...
QARun Installation and Configuration Guide
QARun Installation and Configuration Guide

Oracle PL/SQL
Oracle PL/SQL

... create or replace trigger only_nulls after update on BOOK for each row when (old.price is null) -- notice the colon with OLD is not used here ...


... given fuzzy data in the fuzzy query from fuzzy table. In fuzzy table, membership values for different fuzzy attributes are being calculated using the above mentioned formulas. If the query has more than one fuzzy attributes then in similar way it finds the membership value for fuzzy equality for oth ...
Getting Started with Database Patching
Getting Started with Database Patching

... manual process. Patching a database environment and keeping it compliant involves understanding the current patch levels, testing the patches and updating the database server with the required patches. vFabric Data Director addresses this problem in two ways. Using vFabric Data Director, an administ ...
Chapter>>10
Chapter>>10

... Ans: Traditional equal-width histograms do not work well with skewed data because the range of values can be so large that a large number of ranges are necessary. Thus, most DBMSs use equal-height histograms as shown in Figure 8.5. In an equal-height histogram, the ranges are determined so that each ...
Optimizing Large Data Handling in SAP ASE for Better
Optimizing Large Data Handling in SAP ASE for Better

... SAP ADAPTIVE SERVER ENTERPRISE AND VLDB SAP Adaptive Server® Enterprise (ASE) offers a versatile high performance enterprise-class relational database management system that is well suited for mission-critical, data-intensive environments. It is designed to handle the most demanding OLTP (online tra ...
Electronic Commerce System Case Study Chapter 22
Electronic Commerce System Case Study Chapter 22

... 22.2 Use Case Model The use case model for the Electronic Commerce System is depicted in Figure 22.1. There are three actors, the Customer, the Supplier, and the Bank. The customer initiates three use cases: Browse Catalog, Place Requisition, and Confirm Delivery. The supplier initiates three use ca ...
The BUCKY Object-Relational Benchmark
The BUCKY Object-Relational Benchmark

... that only tests the object extensions in object-relational systems. After all, there are many aspects to overall application performance; the query performance of object extensions is only a part of the story. We agree. However, our goal for BUCKY was to provide a benchmark that is as speci c as pos ...
Automating Layout of Relational Databases
Automating Layout of Relational Databases

... I/O access patterns of queries and updates that execute against the system. For example, for a single-table query that involves the scan of a large table (or index), it may be advantageous to define a layout in which the referenced table (or index) is allocated on a large number of disks. This is b ...
Query Example
Query Example

...  Approach: for each customer, find the number of branches in Brooklyn at which they have accounts, and compare with total number of branches in Brooklyn  QBE does not provide subquery functionality, so both above tasks have to be combined in a single query.  Can be done for this query, but there ...
Veritas Cluster Server Database Agent for Microsoft SQL
Veritas Cluster Server Database Agent for Microsoft SQL

... perform distributed transactions. A distributed transaction updates data on more than one computer in a network. The MSDTC service ensures that a transaction is successfully committed on each computer. A failure to commit on a single system aborts the transaction on all systems in the network. If a ...
What`s The Diff? Using the Metadata Differ to Compare Object
What`s The Diff? Using the Metadata Differ to Compare Object

... Clearly, the software can show differences between the metadata of the objects and can return SQL statements to correct these metadata differences, but the choice of which changes should be applied is a policy decision which can only be made by the user. Consequently, the Metadata API has no mechani ...
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Microsoft SQL Server

Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications which may run either on the same computer or on another computer across a network (including the Internet).Microsoft markets at least a dozen different editions of Microsoft SQL Server, aimed at different audiences and for workloads ranging from small single-machine applications to large Internet-facing applications with many concurrent users. SQL Server uses as its primary query languages T-SQL and ANSI SQL.
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