Transactional Consistency and Automatic Management
... addition to its key, each entry in the cache is tagged with its validity interval, as shown in Figure 3. This interval is the range of time at which the cached value was current. Its lower bound is the commit time of the transaction that caused it to become valid, and its upper bound is the commit t ...
... addition to its key, each entry in the cache is tagged with its validity interval, as shown in Figure 3. This interval is the range of time at which the cached value was current. Its lower bound is the commit time of the transaction that caused it to become valid, and its upper bound is the commit t ...
MCDB: A Monte Carlo Approach to Managing Uncertain Data
... tion. In the database research literature, the usual approach to addressing uncertainty employs an extended relational model (ERM), in which the classical relational model is augmented with attributelevel or tuple-level probability values, which are loaded into the database along with the data itsel ...
... tion. In the database research literature, the usual approach to addressing uncertainty employs an extended relational model (ERM), in which the classical relational model is augmented with attributelevel or tuple-level probability values, which are loaded into the database along with the data itsel ...
Matching Database Access Patterns to Storage Characteristics
... in parallel. This balance is quite sensitive and prone to human errors. To tune its performance, DBMS rely on generic parameters set by a database administrator (DBA). This, however, makes it difficult to adapt to the device-specific characteristics and dynamic query mixes, resulting in inefficiency ...
... in parallel. This balance is quite sensitive and prone to human errors. To tune its performance, DBMS rely on generic parameters set by a database administrator (DBA). This, however, makes it difficult to adapt to the device-specific characteristics and dynamic query mixes, resulting in inefficiency ...
Survey Paper for CS748T Distributed Database Management
... materialized views and to the data on which the queries are posed as the underlying or base data. The synchronization problem is to insure that, when the underlying data is updated the updates are propagated to the materialized view (this problem is called materialized view maintenance) and that the ...
... materialized views and to the data on which the queries are posed as the underlying or base data. The synchronization problem is to insure that, when the underlying data is updated the updates are propagated to the materialized view (this problem is called materialized view maintenance) and that the ...
reldes
... Here are the steps in the database design process. Each step is discussed in greater detail in the remaining sections of this paper. Step One: Determine the purpose of your database. This will help you decide which facts you want Microsoft Access to store. Step Two: Determine the tables you need. O ...
... Here are the steps in the database design process. Each step is discussed in greater detail in the remaining sections of this paper. Step One: Determine the purpose of your database. This will help you decide which facts you want Microsoft Access to store. Step Two: Determine the tables you need. O ...
Chapter 7: Database Applications and Privacy
... Data mining is: A. the discovery of queried information from large database. B. the discovery and extraction of hidden predictive information from large databases. C. only accessible and available on mainframe computers. D. when a user creates a database that can be accessed and used by other users. ...
... Data mining is: A. the discovery of queried information from large database. B. the discovery and extraction of hidden predictive information from large databases. C. only accessible and available on mainframe computers. D. when a user creates a database that can be accessed and used by other users. ...
Generalized Search Trees for Database Systems
... facilities for search, maintenance, concurrency control and recovery. 2. Search Trees For Extensible Data Types: As an alternative to developing new data structures, existing data structures such as B+-trees and R-trees can be made extensible in the data types they support [Sto86]. For example, B+-t ...
... facilities for search, maintenance, concurrency control and recovery. 2. Search Trees For Extensible Data Types: As an alternative to developing new data structures, existing data structures such as B+-trees and R-trees can be made extensible in the data types they support [Sto86]. For example, B+-t ...
ACTIVE Deliverable template - PlanetData
... Contractual delivery date: Actual delivery date: Version: ...
... Contractual delivery date: Actual delivery date: Version: ...
ppt
... “For a given student and course, there is a single grade.” “Students can take only one course, and receive a single grade for that course; further, no two students in a course receive the same grade.” ...
... “For a given student and course, there is a single grade.” “Students can take only one course, and receive a single grade for that course; further, no two students in a course receive the same grade.” ...
Chapter 2
... Contains tables that describe the database structure Is in the SYSTEM user schema Is automatically updated as users create and modify tables Cannot be updated directly Contains views that allow users to retrieve information about the database structure View: is a db object that the DBMS bases ...
... Contains tables that describe the database structure Is in the SYSTEM user schema Is automatically updated as users create and modify tables Cannot be updated directly Contains views that allow users to retrieve information about the database structure View: is a db object that the DBMS bases ...
Database System Concepts, 6 th Ed
... tot_cred numeric (3,0) default 0, primary key (ID)) create index studentID_index on student(ID) Indices are data structures used to speed up access to records with specified values for index attributes e.g. select * from student where ID = ‘12345’ can be executed by using the index to find the ...
... tot_cred numeric (3,0) default 0, primary key (ID)) create index studentID_index on student(ID) Indices are data structures used to speed up access to records with specified values for index attributes e.g. select * from student where ID = ‘12345’ can be executed by using the index to find the ...
Automatic Conflict Resolution to Integrate Relational Databases
... Join conditions are inserted as needed when available to join tables. Different physical representations for the same concept are combined. Hierarchically related concepts are combined based on their IS-A relationship in the standard dictionary. ...
... Join conditions are inserted as needed when available to join tables. Different physical representations for the same concept are combined. Hierarchically related concepts are combined based on their IS-A relationship in the standard dictionary. ...
Lecture5
... Java Script Object notation for data representation The problem: UNIX, Windows, Linux, Mac: they all represent data ...
... Java Script Object notation for data representation The problem: UNIX, Windows, Linux, Mac: they all represent data ...
SQL Server 2016, New Database Features
... SQL Server 2016 Developer Edition offers the full feature set of SQL Server 2016 Enterprise Edition, but Developer Edition is for development and test only, and not for production environments or use with production data. Scale out relational and non-relational data queries with the simplicity of T- ...
... SQL Server 2016 Developer Edition offers the full feature set of SQL Server 2016 Enterprise Edition, but Developer Edition is for development and test only, and not for production environments or use with production data. Scale out relational and non-relational data queries with the simplicity of T- ...
Java Database Connectivity (JDBC)
... SELECT NAME, ADDRESS, TAX_NR FROM CUSTOMER WHERE CUSTOMER_ID = ? ...
... SELECT NAME, ADDRESS, TAX_NR FROM CUSTOMER WHERE CUSTOMER_ID = ? ...
Final - NCC Education
... Explain the role of a DBMS (database management system) in a distributed database system. Your answer should refer to the concepts of concurrency control and query optimiser. Any DBMS that needs to operate for a distributed database will be more complex than for a stand-alone database (1 mark). More ...
... Explain the role of a DBMS (database management system) in a distributed database system. Your answer should refer to the concepts of concurrency control and query optimiser. Any DBMS that needs to operate for a distributed database will be more complex than for a stand-alone database (1 mark). More ...
ExamView - Untitled.tst
... ____ 22. In most cases, you will probably add records to a database with the BULK INSERT statement. ____ 23. You use the ? wildcard with the SELECT statement to retrieve all fields from a table. ____ 24. The criteria portion of the SELECT statement determines which fields to retrieve from a table. _ ...
... ____ 22. In most cases, you will probably add records to a database with the BULK INSERT statement. ____ 23. You use the ? wildcard with the SELECT statement to retrieve all fields from a table. ____ 24. The criteria portion of the SELECT statement determines which fields to retrieve from a table. _ ...
Database System Concepts, 6 th Ed
... SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ Database System Concepts - 6th Edition ...
... SQL:1999 allows more than one function/procedure of the same name (called name overloading), as long as the number of arguments differ, or at least the types of the arguments differ Database System Concepts - 6th Edition ...
Spatial Query Languages - Spatial Database Group
... What is SQL? SQL - General Information is a standard query language for relational databases It support logical data model concepts, such as relations, keys, ... Supported by major brands, e.g. IBM DB2, Oracle, MS SQL Server, Sybase, ... 3 versions: SQL1 (1986), SQL2 (1992), SQL 3 (1999) Can expres ...
... What is SQL? SQL - General Information is a standard query language for relational databases It support logical data model concepts, such as relations, keys, ... Supported by major brands, e.g. IBM DB2, Oracle, MS SQL Server, Sybase, ... 3 versions: SQL1 (1986), SQL2 (1992), SQL 3 (1999) Can expres ...
Proceedings
... chose this approach to compare downsized versions with the original application which makes it useful as a research benchmark. In a non-trivial case study we refactored the C version of the embedded database engine Berkeley DB into features. The footprint of Berkeley DB is fairly small (484 KB) and ...
... chose this approach to compare downsized versions with the original application which makes it useful as a research benchmark. In a non-trivial case study we refactored the C version of the embedded database engine Berkeley DB into features. The footprint of Berkeley DB is fairly small (484 KB) and ...
Best Practices Guide: MDB Database Maintenance
... The size of files in the database location need to be monitored, so that as files in the location approach a size of 2 gigabytes on 32 bit OS, the appropriate action can be taken to reorganize the table(file) across additional locations using the modify command Note: The modify command will destroy ...
... The size of files in the database location need to be monitored, so that as files in the location approach a size of 2 gigabytes on 32 bit OS, the appropriate action can be taken to reorganize the table(file) across additional locations using the modify command Note: The modify command will destroy ...
here
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
DBMS – SECURITY ISSUES
... automatically includes the Admin user account in the workgroup information file it creates. The Admin account is the same for every copy of Microsoft Access and for other applications, such as Microsoft Visual Basic, that use the Microsoft Jet database engine. By default, Microsoft Access automatica ...
... automatically includes the Admin user account in the workgroup information file it creates. The Admin account is the same for every copy of Microsoft Access and for other applications, such as Microsoft Visual Basic, that use the Microsoft Jet database engine. By default, Microsoft Access automatica ...
Scalar Aggregation in FD-Inconsistent Databases
... the integrated database may be inconsistent with the constraints). The notion of a consistent query answer [2] attempts to reduce this tension by using constraints to qualify query answers. A consistent answer is, intuitively, true regardless of the way the database is fixed to remove constraint vio ...
... the integrated database may be inconsistent with the constraints). The notion of a consistent query answer [2] attempts to reduce this tension by using constraints to qualify query answers. A consistent answer is, intuitively, true regardless of the way the database is fixed to remove constraint vio ...