Data Warehousing (Alex Ostrovsky)
... ► Very flexible, multiple distinct relations can be defined from a set of data ► Can be customer or object specific ► Persistent – once result is computed from the raw events, it doesn’t need to be recomputed again, giving faster response time on subsequent queries. ...
... ► Very flexible, multiple distinct relations can be defined from a set of data ► Can be customer or object specific ► Persistent – once result is computed from the raw events, it doesn’t need to be recomputed again, giving faster response time on subsequent queries. ...
The Relational Model
... A set of fields is a key for a relation if : 1. No two distinct tuples can have same values in all key fields, and 2. This is not true for any subset of the key. Part 2 false? A superkey. If there’s >1 key for a relation, one of the keys is chosen (by DBA) to be the primary key. ...
... A set of fields is a key for a relation if : 1. No two distinct tuples can have same values in all key fields, and 2. This is not true for any subset of the key. Part 2 false? A superkey. If there’s >1 key for a relation, one of the keys is chosen (by DBA) to be the primary key. ...
Miguel Cordone`s slides (Working with Data), Powerpoint file
... * the data consists of simple key/value pairs * the data is related to the application rather than the user * the data does not require other data in order to be meaningful or useful ...
... * the data consists of simple key/value pairs * the data is related to the application rather than the user * the data does not require other data in order to be meaningful or useful ...
SQLIII
... Sometimes better to execute parts of application inside the database system • more efficient, minimize the amount of data transferred • can be reused by other users Stored Procedure: a program that uses a single SQL statement and executed at the database server ...
... Sometimes better to execute parts of application inside the database system • more efficient, minimize the amount of data transferred • can be reused by other users Stored Procedure: a program that uses a single SQL statement and executed at the database server ...
Database Management System
... So little fear of concurrency or transaction issues. Microsoft Azure SQL is an exception. Need to handle concurrency (and transactions/logs) in your own code. Always use optimistic concurrency (not pessimistic locking). See Chapter 7, but keep the original values when you read data and use ...
... So little fear of concurrency or transaction issues. Microsoft Azure SQL is an exception. Need to handle concurrency (and transactions/logs) in your own code. Always use optimistic concurrency (not pessimistic locking). See Chapter 7, but keep the original values when you read data and use ...
data
... Atomicity of updates (see page 23) Failures may leave database in an inconsistent state with partial updates carried out Example: Transfer of funds (say $1000) from one account (say $5000) to another (say $2000) should either complete or not happen at all. ...
... Atomicity of updates (see page 23) Failures may leave database in an inconsistent state with partial updates carried out Example: Transfer of funds (say $1000) from one account (say $5000) to another (say $2000) should either complete or not happen at all. ...
Computer Science
... 1. C++ Standard /predefined/ Data Types and abstract /user defined/ Data Types: literals, defined constants, variables. 2. Expressions in C++: Operands and Operators. Precedence and associativity of Arithmetic, Relational, Logical and Assignment operators. 3. Routine concept in C++: function signatu ...
... 1. C++ Standard /predefined/ Data Types and abstract /user defined/ Data Types: literals, defined constants, variables. 2. Expressions in C++: Operands and Operators. Precedence and associativity of Arithmetic, Relational, Logical and Assignment operators. 3. Routine concept in C++: function signatu ...
RFGex Prediction 2009 pt1
... ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that guarantees database transactions are processed reliably and is a necessity for financial transactions and other applications where precision is a requirement. Conversely, most NoSQL DBs tout their schema-less capability ...
... ACID (Atomicity, Consistency, Isolation, Durability) is a set of properties that guarantees database transactions are processed reliably and is a necessity for financial transactions and other applications where precision is a requirement. Conversely, most NoSQL DBs tout their schema-less capability ...
2.1.5 Databases - GCSE Computing
... Querying: involves using software to search the database for information of interest to the user. E.g. a user of a car showroom database could run a sophisticated query to “find all hatchback or saloon Toyota cars registered between August 2006 and July 2010 but not with 5 doors”. Maintaining a log ...
... Querying: involves using software to search the database for information of interest to the user. E.g. a user of a car showroom database could run a sophisticated query to “find all hatchback or saloon Toyota cars registered between August 2006 and July 2010 but not with 5 doors”. Maintaining a log ...
Tesora is Now a Part of Stratoscale | Stratoscale
... DevOps use a common infrastructure to manage hundreds or even thousands of database instances in an economical way. Common administrative tasks include provisioning, deployment, configuration, tuning, monitoring and administration are presented in a simple, unified way. The result is a platform that ...
... DevOps use a common infrastructure to manage hundreds or even thousands of database instances in an economical way. Common administrative tasks include provisioning, deployment, configuration, tuning, monitoring and administration are presented in a simple, unified way. The result is a platform that ...
SQL -- Data Definition Language
... The foreign key clause lists foreign key (FK) attributes and the name of the relation referenced by the FK. By default, a FK references PK attributes of the referenced table. ...
... The foreign key clause lists foreign key (FK) attributes and the name of the relation referenced by the FK. By default, a FK references PK attributes of the referenced table. ...
USE-FOR-IGRAPH-_-Performance-Analysis-Review
... Managing poor performance, migrating databases into cost effective cloud environments, increased maintenance and software investment are all problems challenging IT budgets. These may be due to the following possible reasons: ...
... Managing poor performance, migrating databases into cost effective cloud environments, increased maintenance and software investment are all problems challenging IT budgets. These may be due to the following possible reasons: ...
ppt - Institut für Informatik
... Using only specific tokens that reflect the structure Longest common subsequence ...
... Using only specific tokens that reflect the structure Longest common subsequence ...
Databases and Database Management Systems
... data storage structures and access paths. Typically uses a physical data model. Conceptual schema at the conceptual level to describe the structure and constraints for the whole database. Uses a conceptual or an implementation data model. External schemas at the external level to describe the variou ...
... data storage structures and access paths. Typically uses a physical data model. Conceptual schema at the conceptual level to describe the structure and constraints for the whole database. Uses a conceptual or an implementation data model. External schemas at the external level to describe the variou ...
database management system-assignment 2
... 4. Comment on the significance of administration of a database system. What are the various functions associated with database administration? ANS: A database administrator (DBA) is a person responsible for the design, implementation, maintenance and repair of an organization's database. They are al ...
... 4. Comment on the significance of administration of a database system. What are the various functions associated with database administration? ANS: A database administrator (DBA) is a person responsible for the design, implementation, maintenance and repair of an organization's database. They are al ...
Database Maintenance Plans
... GO -- Adds a job step for reorganizing all of the indexes in the HumanResources.Employee table to the HistoryCleanupTask_1 job. ...
... GO -- Adds a job step for reorganizing all of the indexes in the HumanResources.Employee table to the HistoryCleanupTask_1 job. ...
Connection
... > SQL Server CE Remote Data Access (RDA) - enables two-way transfer of data between SQL CE database and networked SQL Server database > SQL Server Merge Replication - more powerful mechanism for two-way data transfer between SQL CE database and networked SQL Server database with automatic conflict ...
... > SQL Server CE Remote Data Access (RDA) - enables two-way transfer of data between SQL CE database and networked SQL Server database > SQL Server Merge Replication - more powerful mechanism for two-way data transfer between SQL CE database and networked SQL Server database with automatic conflict ...
Document
... 1. Application issues query, intercepted by proxy and rewritten. 2. If necessary, adjust column encryption level. 3. Proxy sends encrypted query to DBMS for execution. 4. Encrypted result returned, proxy decrypts, returns to application. ...
... 1. Application issues query, intercepted by proxy and rewritten. 2. If necessary, adjust column encryption level. 3. Proxy sends encrypted query to DBMS for execution. 4. Encrypted result returned, proxy decrypts, returns to application. ...
Directmoving.com - El
... Active Server Pages (ASP) Definition of ASP: Server based scripting language Interpreted at run time. Used to create Server Side logic to handle anything from Dynamic page creation to data coming from a Client Browser. ...
... Active Server Pages (ASP) Definition of ASP: Server based scripting language Interpreted at run time. Used to create Server Side logic to handle anything from Dynamic page creation to data coming from a Client Browser. ...
Lecture Six - Helios Hud
... putting all the data in one big storeroom. This adds speed and flexibility. The tables are linked by defined relations making it possible to combine data from several tables on request. The SQL part of MySQL stands for "Structured Query Language" - the most common standardized language used to acces ...
... putting all the data in one big storeroom. This adds speed and flexibility. The tables are linked by defined relations making it possible to combine data from several tables on request. The SQL part of MySQL stands for "Structured Query Language" - the most common standardized language used to acces ...
Decision Support System - Computer Science Department
... 5. Which of the following is the best example of metadata? A. The price of a car B. A social security number C. The creation date of a report D. The approximate value of a house 6. Some data attributes are enemies. For example, secure and accessible are enemies. Making data more accessible decreases ...
... 5. Which of the following is the best example of metadata? A. The price of a car B. A social security number C. The creation date of a report D. The approximate value of a house 6. Some data attributes are enemies. For example, secure and accessible are enemies. Making data more accessible decreases ...
Oracle Database settings Best Practice (1)
... If ServersPerDSN is set to N where N > 1 then the first (N * MaxConnsPerServer) client connections to the specific server DSN will be distributed in round robin fashion over N server processes. If additional client connections beyond (N * MaxConnsPerServer) are opened to the same server DSN then tho ...
... If ServersPerDSN is set to N where N > 1 then the first (N * MaxConnsPerServer) client connections to the specific server DSN will be distributed in round robin fashion over N server processes. If additional client connections beyond (N * MaxConnsPerServer) are opened to the same server DSN then tho ...
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.