Graph Databases (GDB)
... • We propose a new kind of Database: Graph Databases (GDB) as a solution to Problems [P1],[P2] and [P3]. • In order to define the GDB we will specify: – The Data Definition Language (DDL) – The Query Language (more generally DML) – Informal Semantics of the above languages • We will also show how to ...
... • We propose a new kind of Database: Graph Databases (GDB) as a solution to Problems [P1],[P2] and [P3]. • In order to define the GDB we will specify: – The Data Definition Language (DDL) – The Query Language (more generally DML) – Informal Semantics of the above languages • We will also show how to ...
Highly Available Transactions: Virtues and
... (Section 3). While weak isolation levels do not provide serializability for general-purpose transactions, they are apparently strong enough to deliver acceptable behavior to many application programmers and are substantially stronger than the semantics provided by current highly available systems. T ...
... (Section 3). While weak isolation levels do not provide serializability for general-purpose transactions, they are apparently strong enough to deliver acceptable behavior to many application programmers and are substantially stronger than the semantics provided by current highly available systems. T ...
Document
... Binary vs. n-ary relationship sets Although it is possible to replace any nonbinary (n-ary, for n > 2) relationship set by a number of distinct binary relationship sets, a n-ary relationship set shows more clearly that several entities participate in a single relationship. ...
... Binary vs. n-ary relationship sets Although it is possible to replace any nonbinary (n-ary, for n > 2) relationship set by a number of distinct binary relationship sets, a n-ary relationship set shows more clearly that several entities participate in a single relationship. ...
Unicode Migration
... Create Unicode database Select Unicode as code page during install. Migration from standard codepage Unicode migration is not a simple matter of altering the codepage and REQUIRES MANDATORY assistance of Siebel Expert Service to protect your data from corruption during the migration process. T ...
... Create Unicode database Select Unicode as code page during install. Migration from standard codepage Unicode migration is not a simple matter of altering the codepage and REQUIRES MANDATORY assistance of Siebel Expert Service to protect your data from corruption during the migration process. T ...
Introduction to Python programming for biologists
... Bioinformatics Data Management • The following material is the result of a curriculum development effort to provide a set of courses to support bioinformatics efforts involving students from the biological sciences, computer science, and mathematics departments. They have been developed as a part o ...
... Bioinformatics Data Management • The following material is the result of a curriculum development effort to provide a set of courses to support bioinformatics efforts involving students from the biological sciences, computer science, and mathematics departments. They have been developed as a part o ...
db_ch2
... Use of entity sets vs. relationship sets Possible guideline is to designate a relationship set to describe an action that occurs between entities Binary versus n-ary relationship sets Although it is possible to replace any nonbinary (n-ary, for n > 2) relationship set by a number of distinct bin ...
... Use of entity sets vs. relationship sets Possible guideline is to designate a relationship set to describe an action that occurs between entities Binary versus n-ary relationship sets Although it is possible to replace any nonbinary (n-ary, for n > 2) relationship set by a number of distinct bin ...
Phinx Documentation
... Good developers always version their code using a SCM system, so why don’t they do the same for their database schema? Phinx allows developers to alter and manipulate databases in a clear and concise way. It avoids the use of writing SQL by hand and instead offers a powerful API for creating migrati ...
... Good developers always version their code using a SCM system, so why don’t they do the same for their database schema? Phinx allows developers to alter and manipulate databases in a clear and concise way. It avoids the use of writing SQL by hand and instead offers a powerful API for creating migrati ...
What Are Locks?
... Use caution with certain Transact-SQL statements Avoid transactions that require user interaction Do not browse data during a transaction Affect the least rows possible with DML statements Access the least rows possible with SELECT statements Issues with nested transactions Allowed, but ...
... Use caution with certain Transact-SQL statements Avoid transactions that require user interaction Do not browse data during a transaction Affect the least rows possible with DML statements Access the least rows possible with SELECT statements Issues with nested transactions Allowed, but ...
Architecture of the Gracenote Service
... • Responsible for fetching new and updated data from upstream Oracle master repository • Distributes data to downstream XPs and sync nodes – Sync node • Just like a master, but it’s upstream parent is another master or sync node rather than an Oracle instance • These are used for replicating data at ...
... • Responsible for fetching new and updated data from upstream Oracle master repository • Distributes data to downstream XPs and sync nodes – Sync node • Just like a master, but it’s upstream parent is another master or sync node rather than an Oracle instance • These are used for replicating data at ...
SqlDependency
... ● Queries that need to stick around for a while Look-up Tables ● When details of change are unimportant ● Only reports that “something has changed” ...
... ● Queries that need to stick around for a while Look-up Tables ● When details of change are unimportant ● Only reports that “something has changed” ...
1-Introduction
... A distributed database management system (D–DBMS) is the software that manages the DDB and provides an access mechanism that makes this distribution transparent to the users. Distributed database system (DDBS) = DDB + D–DBMS ...
... A distributed database management system (D–DBMS) is the software that manages the DDB and provides an access mechanism that makes this distribution transparent to the users. Distributed database system (DDBS) = DDB + D–DBMS ...
downloading
... in the Release Notes. All documents, therefore, always have to be considered in conjunction with the Release Notes. The rasdaman Documentation Set consists of the following documents: Installation and Administration Guide Query Language Guide C++ Developer's Guide Java Developer's Guide ra ...
... in the Release Notes. All documents, therefore, always have to be considered in conjunction with the Release Notes. The rasdaman Documentation Set consists of the following documents: Installation and Administration Guide Query Language Guide C++ Developer's Guide Java Developer's Guide ra ...
Oracle Database Backup-and-Recovery Best Practices and New
... • Assess host resources, production disk I/O, HBA/network, tape drive throughput • Minimum performant component of these will be performance bottleneck ...
... • Assess host resources, production disk I/O, HBA/network, tape drive throughput • Minimum performant component of these will be performance bottleneck ...
hot topics in database systems, fall 2002
... is in general more desirable since it is work-conserving: aborting the transaction in progress would not only waste the work that has been done on it so far, it also creates extra work since this transaction needs to be rolled back. On the other hand, just reordering the queue can only have an effec ...
... is in general more desirable since it is work-conserving: aborting the transaction in progress would not only waste the work that has been done on it so far, it also creates extra work since this transaction needs to be rolled back. On the other hand, just reordering the queue can only have an effec ...
Part of chapter 7 - Software and Mind
... in the subsequent footnotes it is usually abbreviated. For these abbreviations, then, the full reference can be found by searching the previous footnotes no further back than the beginning of the current titled part. The statement “italics added” in a footnote indicates that the emphasis is only in ...
... in the subsequent footnotes it is usually abbreviated. For these abbreviations, then, the full reference can be found by searching the previous footnotes no further back than the beginning of the current titled part. The statement “italics added” in a footnote indicates that the emphasis is only in ...
DBAI_les01
... • A collection of the most recently used definitions in the database • Includes information about database files, tables, indexes, columns, users, privileges, and other database objects • During the parse phase, the server process looks at the data dictionary for information to resolve object names ...
... • A collection of the most recently used definitions in the database • Includes information about database files, tables, indexes, columns, users, privileges, and other database objects • During the parse phase, the server process looks at the data dictionary for information to resolve object names ...
Design Your Own Database Concept to Implementation
... Look at the employee table again. We could identify an employee by name or by employeeID. These are both keys. We call these candidate keys because they are candidates from which we will choose the primary key. The primary key is the column or set of columns that we will use to identify a single row ...
... Look at the employee table again. We could identify an employee by name or by employeeID. These are both keys. We call these candidate keys because they are candidates from which we will choose the primary key. The primary key is the column or set of columns that we will use to identify a single row ...
No Slide Title
... Edited: Wei-Pang Yang, IM.NDHU, 2005 Source: Database System Concepts, Silberschatz etc. 2001 ...
... Edited: Wei-Pang Yang, IM.NDHU, 2005 Source: Database System Concepts, Silberschatz etc. 2001 ...
Chapter 18 of Database Design, Application Development
... Object Relational DBMS for User-Defined Types A relational DBMS extended with an object query processor for user-defined data types. Complex data is added as a user-defined type. User-defined functions can be defined and then used in SQL statements. SQL:1999 provides the standard for object r ...
... Object Relational DBMS for User-Defined Types A relational DBMS extended with an object query processor for user-defined data types. Complex data is added as a user-defined type. User-defined functions can be defined and then used in SQL statements. SQL:1999 provides the standard for object r ...
PAQO: A Preference-Aware Query Optimizer for PostgreSQL
... by the same server. If a distributed database system were to construct and execute a plan that evaluated any such operations on the same server, the user’s separation of duty requirement would be violated. This situation would be especially problematic if this requirement is dictated by the user’s e ...
... by the same server. If a distributed database system were to construct and execute a plan that evaluated any such operations on the same server, the user’s separation of duty requirement would be violated. This situation would be especially problematic if this requirement is dictated by the user’s e ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.