Data Source Architectural Patterns
... This is conceptually messy, as ideally the in-memory object doesn't have to know anything about the SQL interface It may also make it difficult to substitute the database for a file if you can't easily create record sets in your own code Nevertheless, in many environments that use Record Set widely, ...
... This is conceptually messy, as ideally the in-memory object doesn't have to know anything about the SQL interface It may also make it difficult to substitute the database for a file if you can't easily create record sets in your own code Nevertheless, in many environments that use Record Set widely, ...
Object Query Language
... has come to defining a similar standard is ANSI and the ANSI X3H2, but this is more an extension to existing relational database standards and does not deal exclusively with OODMS. The ODMG standard was initially focused on defining a common database interface for the products produced by vendors wh ...
... has come to defining a similar standard is ANSI and the ANSI X3H2, but this is more an extension to existing relational database standards and does not deal exclusively with OODMS. The ODMG standard was initially focused on defining a common database interface for the products produced by vendors wh ...
When Development Means Business FY2000 First Quarter
... Even ignoring serious issues such as relational data representation in XML, the DBMS technology is a core part of too many applications in use today. Although XML may be a realistic possibility for some smaller applications without legacy data or legacy application dependencies, most large-scale pro ...
... Even ignoring serious issues such as relational data representation in XML, the DBMS technology is a core part of too many applications in use today. Although XML may be a realistic possibility for some smaller applications without legacy data or legacy application dependencies, most large-scale pro ...
11 ACCESS TO AN ORACLE DATABASE USING JDBC ANTAL
... structured sets of persistent data, offering ad hoc query facilities to many users) vendor and relational DBMS products. A RDBMS (Relational DataBase Management System) is a database based on the relational model developed by E.F. Codd. A relational database allows the definition of data structures, ...
... structured sets of persistent data, offering ad hoc query facilities to many users) vendor and relational DBMS products. A RDBMS (Relational DataBase Management System) is a database based on the relational model developed by E.F. Codd. A relational database allows the definition of data structures, ...
Bind Variables, Dynamic SQL, and other catastrophes
... the database and is a performance and scalability killer. What you want to see is your application using the existing execution paths and query plans already in the database memory as much as possible, i.e. soft parsing. So you need to design your SQL code to be as universal as possible, and that me ...
... the database and is a performance and scalability killer. What you want to see is your application using the existing execution paths and query plans already in the database memory as much as possible, i.e. soft parsing. So you need to design your SQL code to be as universal as possible, and that me ...
Database Denial of Service
... You don’t need to be a database geek to know about Db-DoS — you just need to look at the news. We have seen recent Oracle issues with invalid object pointers, a serious vulnerability in the workload manager and the TNS listener barfing on malformed packets, and multiple vulnerabilities in MySQL, inc ...
... You don’t need to be a database geek to know about Db-DoS — you just need to look at the news. We have seen recent Oracle issues with invalid object pointers, a serious vulnerability in the workload manager and the TNS listener barfing on malformed packets, and multiple vulnerabilities in MySQL, inc ...
How to Build a Stream Database
... • Query nodes represent a single-block query, and are generated code. • All query nodes live in a run-time system, and follow an API – Callbacks : initialize, accept_tuple, accept_command, free – Functions : post_tuple, standard and user-defined functions ...
... • Query nodes represent a single-block query, and are generated code. • All query nodes live in a run-time system, and follow an API – Callbacks : initialize, accept_tuple, accept_command, free – Functions : post_tuple, standard and user-defined functions ...
Preventing Transaction Logs From Filling Up
... essential to keeping the database in working order. Not only does the database need to be backed up but the accompanying transaction log needs to be backed up as well. Failure to back up the transaction log can cause the database to become inoperable due to the file growing too large. This document ...
... essential to keeping the database in working order. Not only does the database need to be backed up but the accompanying transaction log needs to be backed up as well. Failure to back up the transaction log can cause the database to become inoperable due to the file growing too large. This document ...
db2 - Binus Repository
... • db2sysc – The main DB2 system controller or engine. In DB2 9.5, there is only one multi-threaded main engine process for the entire partition. All Engine Dispatchable Units (EDUs) are threads inside this process. Without this process, the database server cannot function. On Windows the process nam ...
... • db2sysc – The main DB2 system controller or engine. In DB2 9.5, there is only one multi-threaded main engine process for the entire partition. All Engine Dispatchable Units (EDUs) are threads inside this process. Without this process, the database server cannot function. On Windows the process nam ...
adbms tutorial 2 lahore leads university
... database. You can refer to a table in the default database using tableName directly; but you need to use the fully-qualified databaseName.tableName to refer to a table NOT in the default database. In our example, we have a database named "southwind" with a table named "products". If we issue "USE so ...
... database. You can refer to a table in the default database using tableName directly; but you need to use the fully-qualified databaseName.tableName to refer to a table NOT in the default database. In our example, we have a database named "southwind" with a table named "products". If we issue "USE so ...
Document
... ACID Transactions • ACID transactions are: – Atomic : Whole transaction or none is done. – Consistent : Database constraints preserved. – Isolated : It appears to the user as if only one process executes at a time. • That is, even though actions of several transactions might be interleaved, the net ...
... ACID Transactions • ACID transactions are: – Atomic : Whole transaction or none is done. – Consistent : Database constraints preserved. – Isolated : It appears to the user as if only one process executes at a time. • That is, even though actions of several transactions might be interleaved, the net ...
Chapter 12
... fields and records from a database • TableAdapter object: connects dataset to underlying database using queries • Query: specifies fields and records to retrieve from a database • Structured Query Language (SQL): set of commands used to access and manipulate data in a database • Select statement: sp ...
... fields and records from a database • TableAdapter object: connects dataset to underlying database using queries • Query: specifies fields and records to retrieve from a database • Structured Query Language (SQL): set of commands used to access and manipulate data in a database • Select statement: sp ...
SAP R/3`s ability to support a number of different databases
... activity by coordinating lock entities defined within the SAP application, in memory within the UNIX/NT process. As such, the ENQ process performs no database calls, and with all potential contention resolved by the application, allows DB2 to be configured with row level locking on all application t ...
... activity by coordinating lock entities defined within the SAP application, in memory within the UNIX/NT process. As such, the ENQ process performs no database calls, and with all potential contention resolved by the application, allows DB2 to be configured with row level locking on all application t ...
MySQL
... Create table (use SQL) Items(ItemName, Price) Orders(OrderID, ShippingAddress) ItemsOrdered(OrderID, ItemName, Quantity) ...
... Create table (use SQL) Items(ItemName, Price) Orders(OrderID, ShippingAddress) ItemsOrdered(OrderID, ItemName, Quantity) ...
Self-optimizing native object database for a dynamic
... must be done manually. This means that when you want to save an object into a relational database you traverse through each object in a collection, pick out each value from its instance variables and save them to the relevant column of a table [5]. When retrieving the object you have to do the oppos ...
... must be done manually. This means that when you want to save an object into a relational database you traverse through each object in a collection, pick out each value from its instance variables and save them to the relevant column of a table [5]. When retrieving the object you have to do the oppos ...
slides - CIS @ Temple University
... reads of same record must return same value. However, a transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but ...
... reads of same record must return same value. However, a transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but ...
Document
... • Bases its actions on concurrency control algorithms, like locking and time stamping. • Ensures computer’s central processing unit (CPU) is used efficiently, not based on FCFS • Facilitates data isolation to ensure that two transactions do not update same data element at same time ...
... • Bases its actions on concurrency control algorithms, like locking and time stamping. • Ensures computer’s central processing unit (CPU) is used efficiently, not based on FCFS • Facilitates data isolation to ensure that two transactions do not update same data element at same time ...
Computer Forensics
... • Used in decision-support applications • Collection of many types of data taken from a number of different databases • Typically composed of a database server • Accessed by software applications or reporting applications: online analytical processing (OLAP) ...
... • Used in decision-support applications • Collection of many types of data taken from a number of different databases • Typically composed of a database server • Accessed by software applications or reporting applications: online analytical processing (OLAP) ...
Indexing Relational Database Content Offline for
... are indexed offline, significant query time computation is required to expand the starting web page set to find navigation paths satisfying the full query, work that we perform offline. Three systems, DBXplorer, BANKS, and DISCOVER, share a similar approach: At query time, given a set of keywords, f ...
... are indexed offline, significant query time computation is required to expand the starting web page set to find navigation paths satisfying the full query, work that we perform offline. Three systems, DBXplorer, BANKS, and DISCOVER, share a similar approach: At query time, given a set of keywords, f ...
Database System Concepts, 6 th Ed
... to wait for T3 to release its lock on B, while executing lock-X(A) causes T3 to wait for T4 to release its lock on A. Such a situation is called a deadlock. To handle a deadlock one of T3 or T4 must be rolled back and its locks released. ...
... to wait for T3 to release its lock on B, while executing lock-X(A) causes T3 to wait for T4 to release its lock on A. Such a situation is called a deadlock. To handle a deadlock one of T3 or T4 must be rolled back and its locks released. ...
Session Title - Lenoir
... faster query processing and data transport as compared to a query where all characteristics are in rows This approach separates the drill-down steps. In addition to accelerating query processing, it provides the user more manageable portions of data. ...
... faster query processing and data transport as compared to a query where all characteristics are in rows This approach separates the drill-down steps. In addition to accelerating query processing, it provides the user more manageable portions of data. ...
transaction
... – if the transaction fails after step 3 and before step 6, the system should ensure that its updates are not reflected in the database, else an inconsistency will result. – transaction- management component ...
... – if the transaction fails after step 3 and before step 6, the system should ensure that its updates are not reflected in the database, else an inconsistency will result. – transaction- management component ...
Transforming Extended Entity-Relationship Model into Object
... object-based database, which included Object-Relational database(ORDB)[4]. ORDB technology extends the RDB by providing a richer data type system and object oriented features, such as objects, classes, and inheritance. This DB technology is well established based on SQL:1999[5] and SQL:2003[6] stand ...
... object-based database, which included Object-Relational database(ORDB)[4]. ORDB technology extends the RDB by providing a richer data type system and object oriented features, such as objects, classes, and inheritance. This DB technology is well established based on SQL:1999[5] and SQL:2003[6] stand ...
Versant Object Database
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.