Physical Database Design - NUS School of Computing
... Indexes may be clustered or non clustered, unique or non unique, or concatenated. Testing and trial-and-error during production may indicate other index choices. A table’s indexes must be maintained with every insert, update, and delete operation performed on the table. Be careful not to ove ...
... Indexes may be clustered or non clustered, unique or non unique, or concatenated. Testing and trial-and-error during production may indicate other index choices. A table’s indexes must be maintained with every insert, update, and delete operation performed on the table. Be careful not to ove ...
Nested Relational Databases
... store the part information must be traversed very quickly in order to display the part on the user's screen within an acceptable response time. Hundreds or thousands of join operations are required to display a complex part. These joins simply cannot be performed fast enough to provide acceptable di ...
... store the part information must be traversed very quickly in order to display the part on the user's screen within an acceptable response time. Hundreds or thousands of join operations are required to display a complex part. These joins simply cannot be performed fast enough to provide acceptable di ...
Databases: storing and retrieving information
... records can take on the same value then that attribute cannot be a primary key. (When in doubt verify with your users). •If a primary key cannot be formed from a single attribute then several attributes can be combined into a composite key. (Each attribute is still a column but together they form a ...
... records can take on the same value then that attribute cannot be a primary key. (When in doubt verify with your users). •If a primary key cannot be formed from a single attribute then several attributes can be combined into a composite key. (Each attribute is still a column but together they form a ...
Chapter 2
... • The ResultSet object has a cursor pointing to the next row in the result, initially pointing before the first row • The next method moves the cursor to the next row, returns false if there is no next row • Fields from the current result row are obtained with ‘get’ methods, one for each type of dat ...
... • The ResultSet object has a cursor pointing to the next row in the result, initially pointing before the first row • The next method moves the cursor to the next row, returns false if there is no next row • Fields from the current result row are obtained with ‘get’ methods, one for each type of dat ...
Lecture 13
... – Create a statement in standard form that is sent to the database for compilation before actually being used – Each time you use it, you simply replace some of the marked parameters using the setXxx methods ...
... – Create a statement in standard form that is sent to the database for compilation before actually being used – Each time you use it, you simply replace some of the marked parameters using the setXxx methods ...
Open - United States Power Squadrons
... HQ roster file obtained via email so that each user can use the normal import utility. Hopefully, this situation has been resolved. There are now three passwords each having different user rights. The lowest level, USER, allows downloading a roster but not uploading. This can be given to any member ...
... HQ roster file obtained via email so that each user can use the normal import utility. Hopefully, this situation has been resolved. There are now three passwords each having different user rights. The lowest level, USER, allows downloading a roster but not uploading. This can be given to any member ...
5.2 Design Patterns
... combined operations from the core or persistent layers. For example, frequently used queries involving multiple calls to the server can be grouped into one function call that will result in improved system performance. ...
... combined operations from the core or persistent layers. For example, frequently used queries involving multiple calls to the server can be grouped into one function call that will result in improved system performance. ...
p2p
... • The cost associated with data placement is more like the issue of view materialization in database (warehouses) which is an hotly research topic in the database community. P2P system design would benefit greatly from research in this area. – Also beneficial to reducing data placement cost are less ...
... • The cost associated with data placement is more like the issue of view materialization in database (warehouses) which is an hotly research topic in the database community. P2P system design would benefit greatly from research in this area. – Also beneficial to reducing data placement cost are less ...
Access Project 1 - Maryville University
... • Click Design View on the shortcut menu • Click the Criteria row in the Trainer Number column of the grid, and then type 42 as the criterion ...
... • Click Design View on the shortcut menu • Click the Criteria row in the Trainer Number column of the grid, and then type 42 as the criterion ...
Boston College Computer Science Department Senior Thesis 2002
... upon a schedule of updates. “Integrated personalization and filtering are performed at each terminal,”7 in the paper “Dynamic Personalization and Information Integration in Multi-Channel Data Dissemination Environments,” by Goto and Kambayashi. In their paper they stipulate that, “Each passenger has ...
... upon a schedule of updates. “Integrated personalization and filtering are performed at each terminal,”7 in the paper “Dynamic Personalization and Information Integration in Multi-Channel Data Dissemination Environments,” by Goto and Kambayashi. In their paper they stipulate that, “Each passenger has ...
JDBC Interfaces
... Transaction Support • Consists of one or more statements that have been executed, completed, and then either committed or rolled back • Default mode for statements is auto-commit – Each statement becomes a “transaction” ...
... Transaction Support • Consists of one or more statements that have been executed, completed, and then either committed or rolled back • Default mode for statements is auto-commit – Each statement becomes a “transaction” ...
Implementation of Object Oriented Data Warehousing using a
... of procedures. There could be no. of data types such as atomic or any other class. Object Oriented Data warehousing, like other areas of Information Technology, is a field in the midst of change. The current systems integration approach is associated with the objective of creating a centralized oper ...
... of procedures. There could be no. of data types such as atomic or any other class. Object Oriented Data warehousing, like other areas of Information Technology, is a field in the midst of change. The current systems integration approach is associated with the objective of creating a centralized oper ...
Module 1: Introduction
... Forms of authorization to modify the database schema (covered in Chapter 8): Index - allows creation and deletion of indices. Resources - allows creation of new relations. Alteration - allows addition or deletion of attributes in a relation. Drop - allows deletion of relations. ...
... Forms of authorization to modify the database schema (covered in Chapter 8): Index - allows creation and deletion of indices. Resources - allows creation of new relations. Alteration - allows addition or deletion of attributes in a relation. Drop - allows deletion of relations. ...
Recovery Solution database Restore
... installation, one must back up the following pieces of inf ormation: 1. On the computer with SQL Server that hosts the Notification Server database: a. The Notification Server database. Either the complete database must be backed up, or only Recovery Solution -related data. Section below describes t ...
... installation, one must back up the following pieces of inf ormation: 1. On the computer with SQL Server that hosts the Notification Server database: a. The Notification Server database. Either the complete database must be backed up, or only Recovery Solution -related data. Section below describes t ...
Ch23b_Views
... refresh before answering the query. Periodic (Snapshot): Refresh periodically. Queries possibly answered using outdated version of view tuples. Widely used, especially for asynchronous replication in distributed databases, and for warehouse applications. Event-based: E.g., Refresh after a fixed ...
... refresh before answering the query. Periodic (Snapshot): Refresh periodically. Queries possibly answered using outdated version of view tuples. Widely used, especially for asynchronous replication in distributed databases, and for warehouse applications. Event-based: E.g., Refresh after a fixed ...
M.Sc. (Computer Science)
... Divide and Conquer: General Method, Binary Search, Finding the Maximum and ...
... Divide and Conquer: General Method, Binary Search, Finding the Maximum and ...
10. STRUCTURED QUERY LANGUAGE
... 10. STRUCTURED QUERY LANGUAGE Structured Query Language (SQL) is a computer language for communication and interaction with databases and was created to be a cross-platform syntax to extract and manipulate data from disparate database systems. So in theory the same SQL queries written for an Oracle ...
... 10. STRUCTURED QUERY LANGUAGE Structured Query Language (SQL) is a computer language for communication and interaction with databases and was created to be a cross-platform syntax to extract and manipulate data from disparate database systems. So in theory the same SQL queries written for an Oracle ...
cos346day21
... – An instance failure occurs when Oracle itself fails due to an operating system or computer hardware failure • Oracle can recover from application and instance failure without using the archived log file – A media failure occurs when Oracle is unable to write to a physical file because of a disk fa ...
... – An instance failure occurs when Oracle itself fails due to an operating system or computer hardware failure • Oracle can recover from application and instance failure without using the archived log file – A media failure occurs when Oracle is unable to write to a physical file because of a disk fa ...
Ch23b_Views
... refresh before answering the query. Periodic (Snapshot): Refresh periodically. Queries possibly answered using outdated version of view tuples. Widely used, especially for asynchronous replication in distributed databases, and for warehouse applications. Event-based: E.g., Refresh after a fixed ...
... refresh before answering the query. Periodic (Snapshot): Refresh periodically. Queries possibly answered using outdated version of view tuples. Widely used, especially for asynchronous replication in distributed databases, and for warehouse applications. Event-based: E.g., Refresh after a fixed ...
Relational Data structure
... represented by means of values. In the hierarchical and network model there are explicit references (pointers), which make them more complicated. ...
... represented by means of values. In the hierarchical and network model there are explicit references (pointers), which make them more complicated. ...
Evolution of Database Technology
... Some commercial products support replicated data, allowing consistent views of the same information to exist at various nodes of a network. Some object-oriented systems now support "long transactions," where data is "checked out" and not restored for hours or days. Some commercial database systems a ...
... Some commercial products support replicated data, allowing consistent views of the same information to exist at various nodes of a network. Some object-oriented systems now support "long transactions," where data is "checked out" and not restored for hours or days. Some commercial database systems a ...
SQL Server for Blackbaud Products
... maximum scalability and availability. It supports large servers with more than 2 GB of RAM and up to 32 processors. Microsoft SQL Server 2005 Workgroup Edition The Workgroup Edition of SQL Server 2005 is supported with releases beginning with The Financial Edge 7.6*. It supports an unlimited databas ...
... maximum scalability and availability. It supports large servers with more than 2 GB of RAM and up to 32 processors. Microsoft SQL Server 2005 Workgroup Edition The Workgroup Edition of SQL Server 2005 is supported with releases beginning with The Financial Edge 7.6*. It supports an unlimited databas ...
Transaction
... as a transaction, but after executing these statements, thinks better of it and issues a ROLLBACK statement If Peter executes his statements after (ins) but before the rollback, he’d see a value (35) that never existed in the database ...
... as a transaction, but after executing these statements, thinks better of it and issues a ROLLBACK statement If Peter executes his statements after (ins) but before the rollback, he’d see a value (35) that never existed in the database ...