- Courses - University of California, Berkeley
... • SQL/Persistent Stored Modules (PSM) -Defines the rules for developing SQL routines, modules, and functions such as those used by stored procedures and triggers. This is implemented in many major RDBMSs through proprietary, nonportable languages, but for the first time we have a standard for writin ...
... • SQL/Persistent Stored Modules (PSM) -Defines the rules for developing SQL routines, modules, and functions such as those used by stored procedures and triggers. This is implemented in many major RDBMSs through proprietary, nonportable languages, but for the first time we have a standard for writin ...
Oracle Database 10g Express
... rows of a table can have duplicate values in a specified column or a set of columns. A table can have more than one unique key. If the UNIQUE constraint comprises more than one column, then the group of columns is called a coomposite key. For example, you can impose the UNIQUE constraint on the Emai ...
... rows of a table can have duplicate values in a specified column or a set of columns. A table can have more than one unique key. If the UNIQUE constraint comprises more than one column, then the group of columns is called a coomposite key. For example, you can impose the UNIQUE constraint on the Emai ...
oodbs - COW :: Ceng
... • Objects in the host language are mapped directly to database objects • Some objects in the host program are persistent. Changing such objects (through an assignment to an instance variable or with a method application) directly and transparently affects the corresponding database object • Accessin ...
... • Objects in the host language are mapped directly to database objects • Some objects in the host program are persistent. Changing such objects (through an assignment to an instance variable or with a method application) directly and transparently affects the corresponding database object • Accessin ...
Lecture 7 - IGLI TAFA
... • Because there is little control or management of data, management will have no knowledge of who is accessing or even making changes to the organization’s data. Lack of data sharing and availability: • Information cannot flow freely across different functional areas or different parts of the organi ...
... • Because there is little control or management of data, management will have no knowledge of who is accessing or even making changes to the organization’s data. Lack of data sharing and availability: • Information cannot flow freely across different functional areas or different parts of the organi ...
Excel
... One-to-one relationships occur when there is exactly one record in Table-A that corresponds to exactly one record in Table-B. One-to-many relationships occur when each record in Table-A may have many linked records in Table-B but each record in Table-B may have only one corresponding record in Table ...
... One-to-one relationships occur when there is exactly one record in Table-A that corresponds to exactly one record in Table-B. One-to-many relationships occur when each record in Table-A may have many linked records in Table-B but each record in Table-B may have only one corresponding record in Table ...
Data Models
... for data modeling Introduced by Peter Chen in 1976 Graphical representation of entities and their ...
... for data modeling Introduced by Peter Chen in 1976 Graphical representation of entities and their ...
Chapter 5
... Data Models (cont.) Relational Model Most popular type of data model A relational model is based on relations A relation is a table that satisfies three criteria – Each cell in the table has one and only one value – Each row in a table is unique – All entries in a column must be of the same ...
... Data Models (cont.) Relational Model Most popular type of data model A relational model is based on relations A relation is a table that satisfies three criteria – Each cell in the table has one and only one value – Each row in a table is unique – All entries in a column must be of the same ...
) ANSWERS DATABASE DESIGN (H4
... fundamental properties of all transactions. Describe these four properties using examples to aid your explanation. (16 marks) Atomicity - All or nothing, indivisible unit performed in its entirety or not at all. Suitable example (up to four marks) Consistency - DB is transformed from one consistent ...
... fundamental properties of all transactions. Describe these four properties using examples to aid your explanation. (16 marks) Atomicity - All or nothing, indivisible unit performed in its entirety or not at all. Suitable example (up to four marks) Consistency - DB is transformed from one consistent ...
APA Format - Professors Online
... Similarly, a view can be re-used in different situations, such as the display of critical business information for different sales regions, without the need to completely redefine or re-program an application. ...
... Similarly, a view can be re-used in different situations, such as the display of critical business information for different sales regions, without the need to completely redefine or re-program an application. ...
hierarchical, network
... Hierarchical and network DBMSs: usually tie related data together through linked lists. Relational and multidimensional DBMSs relate data through information contained in the data. “ Copyright 2005 John Wiley & Sons Inc.” ...
... Hierarchical and network DBMSs: usually tie related data together through linked lists. Relational and multidimensional DBMSs relate data through information contained in the data. “ Copyright 2005 John Wiley & Sons Inc.” ...
Document
... Once database has been populated, users can query the data A data manipulation language controls how the user can specify queries, (and thus what types of queries are allowed) ...
... Once database has been populated, users can query the data A data manipulation language controls how the user can specify queries, (and thus what types of queries are allowed) ...
Proceedings of the FREENIX Track: 2004 USENIX Annual Technical Conference USENIX Association
... A checkpoint of a virtual database can be performed at any point in time. Checkpointing can be manually triggered by the administrator or automated based on temporal rules. Taking a snapshot of a backend while the system is online requires disabling this backend so that no updates occur on it during ...
... A checkpoint of a virtual database can be performed at any point in time. Checkpointing can be manually triggered by the administrator or automated based on temporal rules. Taking a snapshot of a backend while the system is online requires disabling this backend so that no updates occur on it during ...
Intermezzo: A typical database architecture
... the buffer manager loads it into a slot in the buffer pool if it is not already there. • The higher-level code must also inform the buffer manager when it no longer needs a block that it has requested to be brought into memory. That way, the buffer manager can re-use the slot for future requests. • A bu ...
... the buffer manager loads it into a slot in the buffer pool if it is not already there. • The higher-level code must also inform the buffer manager when it no longer needs a block that it has requested to be brought into memory. That way, the buffer manager can re-use the slot for future requests. • A bu ...
Oracle 10g Database Administrator: Implementation and
... partial access allowed to data by other sessions • An exclusive lock completely prohibits changes to data, but still allows read access • Locking of transactions and tables (using transactional control commands or LOCK TABLE) create locking situations manually • In this chapter you examine how locks ...
... partial access allowed to data by other sessions • An exclusive lock completely prohibits changes to data, but still allows read access • Locking of transactions and tables (using transactional control commands or LOCK TABLE) create locking situations manually • In this chapter you examine how locks ...
Principles of Information Systems, Ninth Edition
... • The number and types of database applications will continue to evolve and yield real business benefits – Identify and briefly discuss business intelligence, data mining, and other database applications Principles of Information Systems, Tenth Edition ...
... • The number and types of database applications will continue to evolve and yield real business benefits – Identify and briefly discuss business intelligence, data mining, and other database applications Principles of Information Systems, Tenth Edition ...
Hershey Beginner Acc..
... What is the purpose of the database? What do you need it to do? Who will use it? How many will use it? When will they use it? (i.e. one at a time, simultaneously) How will they use it? (i.e. desktop, server, web-interface) Who will create it? Who will maintain & modify it? Who will do data entry? Do ...
... What is the purpose of the database? What do you need it to do? Who will use it? How many will use it? When will they use it? (i.e. one at a time, simultaneously) How will they use it? (i.e. desktop, server, web-interface) Who will create it? Who will maintain & modify it? Who will do data entry? Do ...
chapter 1 notes
... CHAPTER-1: DATABASE SYSTEM CONCEPTS The data values stored in the database must satisfy certain types of consistency constraints. When new constraints are added, it is difficult to change the programs to enforce them. 5. Atomicity problems: A computer system, like any other mechanical or electrical ...
... CHAPTER-1: DATABASE SYSTEM CONCEPTS The data values stored in the database must satisfy certain types of consistency constraints. When new constraints are added, it is difficult to change the programs to enforce them. 5. Atomicity problems: A computer system, like any other mechanical or electrical ...
MAYUR Relational Database Management System Model Answer
... The highest level in the example is entire database and level below are type:1) Area 2) File 3) Records d) What do you mean by lock based protocol? Explain two phase locking protocol. Ans:Lock Based Protocols:Locking protocols is a set of rules followed by all transactions while requesting and relea ...
... The highest level in the example is entire database and level below are type:1) Area 2) File 3) Records d) What do you mean by lock based protocol? Explain two phase locking protocol. Ans:Lock Based Protocols:Locking protocols is a set of rules followed by all transactions while requesting and relea ...
Database Management Systems (DBMS)
... On retrieval process, user needs to retrieve the record once its key is entered and the hashing routine is used to determine where the record can be found on storage disks. Major difficulty with the hashing procedure is due to that some addresses will never get generated whilst two or more record ke ...
... On retrieval process, user needs to retrieve the record once its key is entered and the hashing routine is used to determine where the record can be found on storage disks. Major difficulty with the hashing procedure is due to that some addresses will never get generated whilst two or more record ke ...
Lecture9 - The University of Texas at Dallas
... Statistical databases (1970s – present) Inference problem in databases (early 1980s - present) Inference problem in MLS/DBMS (late 1980s – present) Unsolvability results (1990) Logic for secure databases (1990) ...
... Statistical databases (1970s – present) Inference problem in databases (early 1980s - present) Inference problem in MLS/DBMS (late 1980s – present) Unsolvability results (1990) Logic for secure databases (1990) ...