ObjectStore
... ObjectStore sets page permission to “no access” if a record is not a memory. Client tries to access the page it has no access to. Hardware detects an access violation and reports memory fault to ObjectStore. ObjectStore loads the record into memory and sets the page permission to read-only. Client t ...
... ObjectStore sets page permission to “no access” if a record is not a memory. Client tries to access the page it has no access to. Hardware detects an access violation and reports memory fault to ObjectStore. ObjectStore loads the record into memory and sets the page permission to read-only. Client t ...
HQL
... Requires a good bit of up front work, but it saves us a ton of pain at the end The following examples assume you’ve already got database tables Also, a note: because Hibernate can operate on multiple table types, it has its own query language variant called HQL ...
... Requires a good bit of up front work, but it saves us a ton of pain at the end The following examples assume you’ve already got database tables Also, a note: because Hibernate can operate on multiple table types, it has its own query language variant called HQL ...
Chapter 1: Introduction
... made XML a great way to exchange data, not just documents XML has become the basis for all new generation data interchange ...
... made XML a great way to exchange data, not just documents XML has become the basis for all new generation data interchange ...
Using data archiving tools to preserve archival records in business
... transactional databases to reduce storage costs and improve performance. They use a similar export-all-tables approach for retiring business systems, but they also have functionality to assemble ‘data objects’ (and so archival records) from their constituent columns and tables and extract these in X ...
... transactional databases to reduce storage costs and improve performance. They use a similar export-all-tables approach for retiring business systems, but they also have functionality to assemble ‘data objects’ (and so archival records) from their constituent columns and tables and extract these in X ...
Overview of ADO.NET Whidbey
... VS.NET inspired management tool. Lots of pieces are disabled at this time. Let’s take a look at it………………… ...
... VS.NET inspired management tool. Lots of pieces are disabled at this time. Let’s take a look at it………………… ...
Normalization
... – minimal number of attributes to support organization’s data requirements – attributes with a close logical relation described as functional dependency are in same relation – minimal redundancy with each attribute occurring only once with the exception of foreign keys needed to join related relatio ...
... – minimal number of attributes to support organization’s data requirements – attributes with a close logical relation described as functional dependency are in same relation – minimal redundancy with each attribute occurring only once with the exception of foreign keys needed to join related relatio ...
Flat File Database
... 2. What are the primary and foreign keys? • Decide on the primary key for each table. (the primary key must be unique for each record). • Decide which field will link the tables. This will be the primary key in one table and becomes the foreign key in the other table. ...
... 2. What are the primary and foreign keys? • Decide on the primary key for each table. (the primary key must be unique for each record). • Decide which field will link the tables. This will be the primary key in one table and becomes the foreign key in the other table. ...
ppt - Columbia University
... Naive or parametric end users – constantly querying and updating the database, using standard types of queries and updates called canned transactions that have been carefully programmed and tested – need to learn very little about the facilities provided by the DBMS – Bank tellers check account bala ...
... Naive or parametric end users – constantly querying and updating the database, using standard types of queries and updates called canned transactions that have been carefully programmed and tested – need to learn very little about the facilities provided by the DBMS – Bank tellers check account bala ...
Introduction - CS 457/557 : Database Management Systems
... • 3-schema architecture Fig 2.2 – External view – Conceptual – structure of DB, hides physical – Internal – physical storage access paths ...
... • 3-schema architecture Fig 2.2 – External view – Conceptual – structure of DB, hides physical – Internal – physical storage access paths ...
Soap (Simple Object Access Protocol)
... Persistence – Add operations • Objects held in the arrays • Access add methods of the arrays ...
... Persistence – Add operations • Objects held in the arrays • Access add methods of the arrays ...
The KISS (Keep It Simple and Straightforward
... unsophisticated. Simplicity does not mean lacking performance. Simplicity is not a position of compromise; rather it’s a position of strength. Penchant for simplicity often leads to elegance, robustness, and ease-of-use. The KISS principles explained above have helped us create fast, flexible, versa ...
... unsophisticated. Simplicity does not mean lacking performance. Simplicity is not a position of compromise; rather it’s a position of strength. Penchant for simplicity often leads to elegance, robustness, and ease-of-use. The KISS principles explained above have helped us create fast, flexible, versa ...
Example - idellys
... XML file exploiting rules First tag level Database Second level Table Third and other levels Columns ...
... XML file exploiting rules First tag level Database Second level Table Third and other levels Columns ...
SQL Analysis Services-2005
... to see the complete model. To avoid overwhelming users with the sheer size of the model, we need the ability to define a view that shows a subset of the model The cube provides such views, called perspectives. A cube can have many perspectives, each one presenting only a specific subset of the mod ...
... to see the complete model. To avoid overwhelming users with the sheer size of the model, we need the ability to define a view that shows a subset of the model The cube provides such views, called perspectives. A cube can have many perspectives, each one presenting only a specific subset of the mod ...
Database-Connection Libraries
... § Business logic includes things like “what do I do after someone clicks ‘checkout’?” § Answer: Show the “how will you pay for this?” screen ...
... § Business logic includes things like “what do I do after someone clicks ‘checkout’?” § Answer: Show the “how will you pay for this?” screen ...
The Relational Data Model
... • Schema: description of data at some level (e.g., tables, attributes, constraints, domains) • Model: tools and language for describing: – Conceptual and external schema • Data definition language (DDL) ...
... • Schema: description of data at some level (e.g., tables, attributes, constraints, domains) • Model: tools and language for describing: – Conceptual and external schema • Data definition language (DDL) ...
The_Spy_Who_Loathed_Me_WEB
... Database Roles • Fixed Roles • 10 created with each DB • Highest level: db_owner ...
... Database Roles • Fixed Roles • 10 created with each DB • Highest level: db_owner ...
database security - S2010
... This SQL code is designed to pull up the records of a specified username from its table of users, however, if the "userName" variable is crafted in a specific way by a malicious user, the SQL statement may do more than the code author intended. For example, setting the "userName" variable as a' or ' ...
... This SQL code is designed to pull up the records of a specified username from its table of users, however, if the "userName" variable is crafted in a specific way by a malicious user, the SQL statement may do more than the code author intended. For example, setting the "userName" variable as a' or ' ...
Database Security - Department of Computer Science and
... be implemented by the application. authorizations based on business logic easier to code at application level Authorization must be done in application code, and may be dispersed all over an application Hard to check or modify authorizations Checking for absence of authorization loopholes becomes ve ...
... be implemented by the application. authorizations based on business logic easier to code at application level Authorization must be done in application code, and may be dispersed all over an application Hard to check or modify authorizations Checking for absence of authorization loopholes becomes ve ...
Relational Algebra
... ) Allows us to combine two relations. – Set-difference ( ) Tuples in reln. 1, but not in reln. 2. – Union ( ) Tuples in reln. 1 and in reln. 2. Additional operations: – Intersection, join, division, renaming: Not essential, but (very!) useful. Since each operation returns a relation, operations ca ...
... ) Allows us to combine two relations. – Set-difference ( ) Tuples in reln. 1, but not in reln. 2. – Union ( ) Tuples in reln. 1 and in reln. 2. Additional operations: – Intersection, join, division, renaming: Not essential, but (very!) useful. Since each operation returns a relation, operations ca ...
Bounded Rationality
... Codd awarded ACM Turing Award 1980s - Oracle marketing demonstrates superiority of relational model ...
... Codd awarded ACM Turing Award 1980s - Oracle marketing demonstrates superiority of relational model ...
Bounded Rationality
... Codd awarded ACM Turing Award 1980s - Oracle marketing demonstrates superiority of relational model ...
... Codd awarded ACM Turing Award 1980s - Oracle marketing demonstrates superiority of relational model ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.