Physical Design
... Each relation can only have either a primary index or a clustering index. Secondary indexes provide a mechanism for specifying an additional key for a base relation that can be used to retrieve data more efficiently. ...
... Each relation can only have either a primary index or a clustering index. Secondary indexes provide a mechanism for specifying an additional key for a base relation that can be used to retrieve data more efficiently. ...
3.blast-and-E-values..
... BLAST can perform a number of similar tasks with different types of sequence: BLASTn – comparing nucleotide sequence vs. nucleotide sequence database - FAST BLASTp – comparing protein sequence vs. protein sequence database - FAST BLASTx – comparing nucleotide sequence vs. protein sequence database b ...
... BLAST can perform a number of similar tasks with different types of sequence: BLASTn – comparing nucleotide sequence vs. nucleotide sequence database - FAST BLASTp – comparing protein sequence vs. protein sequence database - FAST BLASTx – comparing nucleotide sequence vs. protein sequence database b ...
CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE
... A heuristic rule is applied to the initial query expression and produces the heuristically transformed equivalent query expressions. This is performed by transforming an initial expression (tree) into an equivalent expression (tree) which is made more efficient for execution. This rule works well in ...
... A heuristic rule is applied to the initial query expression and produces the heuristically transformed equivalent query expressions. This is performed by transforming an initial expression (tree) into an equivalent expression (tree) which is made more efficient for execution. This rule works well in ...
Distributed Databases yingying
... A relational distributed system is likely to outperform a nonrelational one by orders of magnitude. The query that involves several sites, there will be many possible ways of moving data around the system. ...
... A relational distributed system is likely to outperform a nonrelational one by orders of magnitude. The query that involves several sites, there will be many possible ways of moving data around the system. ...
An Approach Finding the Right Tolerance Level for Clinical Data Acceptance
... error rate is the ratio of mismatched observations over the total observations checked. In our paper the true error rate is denoted as (p). As a subject undergoes treatment during a clinical study, case report questionnaires are filled out. The number of discrepancies from what was written on the fo ...
... error rate is the ratio of mismatched observations over the total observations checked. In our paper the true error rate is denoted as (p). As a subject undergoes treatment during a clinical study, case report questionnaires are filled out. The number of discrepancies from what was written on the fo ...
Database Systems: Design, Implementation, and Management
... The number of columns is known as its degree. All values in a column must conform to the same data format (type) and must be within a specified range, known as the attribute domain. Changing the order of the rows and/or columns does not change the table. ...
... The number of columns is known as its degree. All values in a column must conform to the same data format (type) and must be within a specified range, known as the attribute domain. Changing the order of the rows and/or columns does not change the table. ...
Some high level language constructs for data of type
... – Allow altering and querying relations – Types can be checked at compile time ...
... – Allow altering and querying relations – Types can be checked at compile time ...
Hyperdatabases - FTP Directory Listing
... and semantic correctness as well as the possibility of alternative executions in case of failures and guaranteed termination. In the current system there is a separate transaction layer on top of DB transactions called logical unit of work which is in the sense of an HDB. However application program ...
... and semantic correctness as well as the possibility of alternative executions in case of failures and guaranteed termination. In the current system there is a separate transaction layer on top of DB transactions called logical unit of work which is in the sense of an HDB. However application program ...
Storage - CS-People by full name
... Mean time to failure (MTTF) – the average time the disk is expected to run continuously without any failure. Typically 5 to 10 years Probability of failure of new disks is quite low, corresponding to a “theoretical MTTF” of 30,000 to 1,200,000 hours for a new disk E.g., an MTTF of 1,200,000 ...
... Mean time to failure (MTTF) – the average time the disk is expected to run continuously without any failure. Typically 5 to 10 years Probability of failure of new disks is quite low, corresponding to a “theoretical MTTF” of 30,000 to 1,200,000 hours for a new disk E.g., an MTTF of 1,200,000 ...
The SQL Query Language DML The SQL Query Language DML
... A transaction identifies an elementary unit of work carried out by an application, to which we wish to allocate particular characteristics of reliability and isolation A system that makes available mechanisms for the definition and execution of transactions is called a transaction processing sys ...
... A transaction identifies an elementary unit of work carried out by an application, to which we wish to allocate particular characteristics of reliability and isolation A system that makes available mechanisms for the definition and execution of transactions is called a transaction processing sys ...
CPGM21X1 - Sheridan College
... If you were using a different kind of database, such as an .MDB file or MySql database, your provider name would be different. ...
... If you were using a different kind of database, such as an .MDB file or MySql database, your provider name would be different. ...
Oracle Data Dictionary
... usually the domain of database administrators (DBAs), the data dictionary is a valuable source of information for end users and developers. The data dictionary consists of two levels: • The internal level contains all base tables that are used by the various DBMS software components and they are nor ...
... usually the domain of database administrators (DBAs), the data dictionary is a valuable source of information for end users and developers. The data dictionary consists of two levels: • The internal level contains all base tables that are used by the various DBMS software components and they are nor ...
Pure Java Databases for Deployed Applications
... Cloudscape is an object-relational database management engine implemented as an embeddable, pure Java class library. It supports the SQL92 database language standard, with extensions for storing and retrieving Java objects in tables and accessing Java objects in queries. Its stored procedure languag ...
... Cloudscape is an object-relational database management engine implemented as an embeddable, pure Java class library. It supports the SQL92 database language standard, with extensions for storing and retrieving Java objects in tables and accessing Java objects in queries. Its stored procedure languag ...
Ch 4. The Evolution of Analytic Scalability
... We had to pull all data together into a separate analytics environment to do analysis ...
... We had to pull all data together into a separate analytics environment to do analysis ...
Models of Software Evolution: Life Cycle Model
... Database applications: These are all the functions needed to create, edit, build, and maintain the database, which should be under the control of a database administrator (process can be carried out by GIS system staff or the users). User applications: GIS can provide many simple applications (e.g. ...
... Database applications: These are all the functions needed to create, edit, build, and maintain the database, which should be under the control of a database administrator (process can be carried out by GIS system staff or the users). User applications: GIS can provide many simple applications (e.g. ...
Application - University Of Worcester
... back end provides scripts, etc. to cover all aspects of a transaction including data storage front end interfaces with product pages and uses product selection to pass information to the cart cart itself provides details of the transaction: » Cart data used to create an on-line order and on-li ...
... back end provides scripts, etc. to cover all aspects of a transaction including data storage front end interfaces with product pages and uses product selection to pass information to the cart cart itself provides details of the transaction: » Cart data used to create an on-line order and on-li ...
dbase
... A systems analyst, or database analyst, designs the structure of the data in terms of record types, fields contained in those record types, and relationships that exist between record types. These structures are defined to the database management system using its data definition language. • Data ...
... A systems analyst, or database analyst, designs the structure of the data in terms of record types, fields contained in those record types, and relationships that exist between record types. These structures are defined to the database management system using its data definition language. • Data ...
Deegree WFS
... - Australian community and support - Ongoing AuScope development (next two years) - Commercial support available - Will meet needs of most users Deegree - Tricky to configure, requires XSLT skills - Will meet most GeoSciML use-cases - Suitable for users serving complex data ...
... - Australian community and support - Ongoing AuScope development (next two years) - Commercial support available - Will meet needs of most users Deegree - Tricky to configure, requires XSLT skills - Will meet most GeoSciML use-cases - Suitable for users serving complex data ...
Solutions 2003 - Department of Computing
... (the names of the attributes may be different, provided they “preserve” the same meaning as above; the marking should also accommodate “small” variations e.g. if one attribute is missing, nut the others are correctly identified, full marks should be awarded) 3 marks for the correct identification ...
... (the names of the attributes may be different, provided they “preserve” the same meaning as above; the marking should also accommodate “small” variations e.g. if one attribute is missing, nut the others are correctly identified, full marks should be awarded) 3 marks for the correct identification ...
More ASP.NET Database
... • Timestamp-based updating: Most database systems support a timestamp column, which the data source updates automatically every time a change is performed. • You do not need to modify the timestamp column manually. • However, you can examine it for changes and thereby determine if another user has r ...
... • Timestamp-based updating: Most database systems support a timestamp column, which the data source updates automatically every time a change is performed. • You do not need to modify the timestamp column manually. • However, you can examine it for changes and thereby determine if another user has r ...
Microsoft Jet Database Engine
The Microsoft Jet Database Engine is a database engine on which several Microsoft products have been built. A database engine is the underlying component of a database, a collection of information stored on a computer in a systematic way. The first version of Jet was developed in 1992, consisting of three modules which could be used to manipulate a database.Database connect for MicrosoftJET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded for general use, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server Express. For larger database needs, Jet databases can be upgraded (or, in Microsoft parlance, ""up-sized"") to Microsoft's flagship database product, SQL Server.However, this does not mean that a MS Jet (Red) database cannot match MS SQL Server in storage capacity. A 5 billion record MS Jet (Red) database with compression and encryption turned on requires about 1 terabyte of disk storage space, comprising hundreds of (*.mdb) files, each acting as partial table, and not as a database in itself.Over the years, Jet has become almost synonymous with Microsoft Access, to the extent that many people refer to a Jet database as an ""Access database"".