Class Diagrams
... Class Diagrams – describe the types of objects in a system and the static relationships among them ...
... Class Diagrams – describe the types of objects in a system and the static relationships among them ...
Recovery - Dr Gordon Russell
... If the DMBS fails and is restarted: 1. The disks are physically or logically damaged then recovery from the log is impossible and instead a restore from a dump is needed. 2. If the disks are OK then the database consistency must be maintained. Writes to the disk which were in progress at the time of ...
... If the DMBS fails and is restarted: 1. The disks are physically or logically damaged then recovery from the log is impossible and instead a restore from a dump is needed. 2. If the disks are OK then the database consistency must be maintained. Writes to the disk which were in progress at the time of ...
Oracle Database 10 g
... reached and a new file needs to be written into the Recovery Area. Space pressure occurs. Warning is issued to user. ...
... reached and a new file needs to be written into the Recovery Area. Space pressure occurs. Warning is issued to user. ...
SQL Server and Oracle
... we want to keep using largely the same software, the same user interface and the same maintenance programs (Adlib Designer), whilst we do want to offer our customers the advantages of SQL Server or Oracle but not the disadvantages. That is why we chose to once-only convert Adlib databases (filled or ...
... we want to keep using largely the same software, the same user interface and the same maintenance programs (Adlib Designer), whilst we do want to offer our customers the advantages of SQL Server or Oracle but not the disadvantages. That is why we chose to once-only convert Adlib databases (filled or ...
Physical Database Design and Performance
... whatever file organization makes sense can be used for storage. Also, because index tables are much smaller than a data table, the index can be more easily designed to reduce the likelihood of key collisions or overflows. 18. The purpose of clustering data in a file: Some database systems allow phys ...
... whatever file organization makes sense can be used for storage. Also, because index tables are much smaller than a data table, the index can be more easily designed to reduce the likelihood of key collisions or overflows. 18. The purpose of clustering data in a file: Some database systems allow phys ...
the entire paper here - Web Informant
... site and queries these particular databases on their journey to ultimate check-out and purchase. There is, and a variety of techniques are used for this purpose, including setting cookies on a user's machine, using downloaded programs that save the browser state, using customer logins and passwords, ...
... site and queries these particular databases on their journey to ultimate check-out and purchase. There is, and a variety of techniques are used for this purpose, including setting cookies on a user's machine, using downloaded programs that save the browser state, using customer logins and passwords, ...
Document
... The map is indexed by a row key, column key, and a timestamp. Output value in the map is an un-interpreted array of bytes. ...
... The map is indexed by a row key, column key, and a timestamp. Output value in the map is an un-interpreted array of bytes. ...
Building Applications using SQL Azure
... SQL Server Integration Services Available in Developer and Trial editions ...
... SQL Server Integration Services Available in Developer and Trial editions ...
Inexact Querying of XML - Technion – Israel Institute of
... • Problems with exact answers: – labels are not always known – content may be unknown, misspelled, etc. – structure may be unknown, or may vary from one representation to another – we may actually want to perform a search, since ...
... • Problems with exact answers: – labels are not always known – content may be unknown, misspelled, etc. – structure may be unknown, or may vary from one representation to another – we may actually want to perform a search, since ...
Entity Sets
... e.g., the database consists of information about a set of customers and accounts and the relationship between them) Physical schema: database design at the physical level Logical schema: database design at the logical level Instance – the actual content of the database at a particular point ...
... e.g., the database consists of information about a set of customers and accounts and the relationship between them) Physical schema: database design at the physical level Logical schema: database design at the logical level Instance – the actual content of the database at a particular point ...
What is Advantage?
... Advantage is a high-performance client/server relational database management system Advantage is an alternative solution to high-priced relational database systems Advantage is specifically designed to be embedded with business applications Advantage is designed to be low-cost and low-mainte ...
... Advantage is a high-performance client/server relational database management system Advantage is an alternative solution to high-priced relational database systems Advantage is specifically designed to be embedded with business applications Advantage is designed to be low-cost and low-mainte ...
Physical Database Design and Performance (Significant Concepts)
... Many databases support ad hoc accesses those may change significantly over time, and known database access can increase or decrease over time (day, week, or month etc.). so the access frequencies tend to be less certain and even than the volume statistics. The precise data volume and usage analysis ...
... Many databases support ad hoc accesses those may change significantly over time, and known database access can increase or decrease over time (day, week, or month etc.). so the access frequencies tend to be less certain and even than the volume statistics. The precise data volume and usage analysis ...
Technical documentation
... ODBC (Open DataBase Connectivity) is worldwide standard developed in 1992 by SQL Access group. It provides database abstraction layer between application and database in a way that an application doesn't have to know what type of database it is using. Palantir users the MySql database which contains ...
... ODBC (Open DataBase Connectivity) is worldwide standard developed in 1992 by SQL Access group. It provides database abstraction layer between application and database in a way that an application doesn't have to know what type of database it is using. Palantir users the MySql database which contains ...
Class Diagrams
... Class Diagrams – describe the types of objects in a system and the static relationships among them ...
... Class Diagrams – describe the types of objects in a system and the static relationships among them ...
Nessun titolo diapositiva
... Integrity constraints, motivations • Useful to describe the application in greater detail • A contribution to “data quality” • An element in the design process (we will discuss “normal forms”) • Used by the system in choosing the strategy for query processing Note: • it is not the case that all prop ...
... Integrity constraints, motivations • Useful to describe the application in greater detail • A contribution to “data quality” • An element in the design process (we will discuss “normal forms”) • Used by the system in choosing the strategy for query processing Note: • it is not the case that all prop ...
Visual Basic Database Access
... • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This the object used to pass data between the database and the dataset. ...
... • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This the object used to pass data between the database and the dataset. ...
Introduction to SQL Server for Windows Administrators
... • A database is at least two files: – At least one database file (.mdf and .ndf) – At least one transaction log file (.ldf) – Most databases will only have one of each ...
... • A database is at least two files: – At least one database file (.mdf and .ndf) – At least one transaction log file (.ldf) – Most databases will only have one of each ...
SQL Server 7.0 Strategy Deck
... tapes, disk arrays, tape robots, and so on, connected to one or more host computers. We are moving towards a world where the storage devices are no longer directly connected to their host systems, but instead talk to them through an intermediate high-performance, scalable network such as FibreChanne ...
... tapes, disk arrays, tape robots, and so on, connected to one or more host computers. We are moving towards a world where the storage devices are no longer directly connected to their host systems, but instead talk to them through an intermediate high-performance, scalable network such as FibreChanne ...
S-Store: Streaming Meets Transaction Processing
... processing, that seamlessly combines OLTP transaction processing with our transactional stream processing model. • S-Store shows how the symbiosis can be implemented in the context of a main-memory, OLTP DBMS in a straight-forward way. S-Store is shown to outperform H-Store, Esper, and Storm on a st ...
... processing, that seamlessly combines OLTP transaction processing with our transactional stream processing model. • S-Store shows how the symbiosis can be implemented in the context of a main-memory, OLTP DBMS in a straight-forward way. S-Store is shown to outperform H-Store, Esper, and Storm on a st ...
Database System Architectures
... shared memory can be accessed by any processor without having to move it using software. Downside – architecture is not scalable beyond 32 or 64 processors ...
... shared memory can be accessed by any processor without having to move it using software. Downside – architecture is not scalable beyond 32 or 64 processors ...
Rules of Engagement Slide Deck - Dave + SQL Server = Ingenious
... You Might Need A Document Database …if your application is document based (eg Content Management, Blogging, User Data Management), or the data isn’t tabular or structured …if you want to archive data, and do not want to deal with schema changes in the archived table …if you are looking for an easie ...
... You Might Need A Document Database …if your application is document based (eg Content Management, Blogging, User Data Management), or the data isn’t tabular or structured …if you want to archive data, and do not want to deal with schema changes in the archived table …if you are looking for an easie ...
slides19
... We want to store the data on “a server” But the problem is we do not trust “the server” for sensitive information! ...
... We want to store the data on “a server” But the problem is we do not trust “the server” for sensitive information! ...
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.