Document
... one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee. 4. We want to keep track of the dependents ...
... one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee. 4. We want to keep track of the dependents ...
CS306_Intro
... one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee. 4. We want to keep track of the dependents ...
... one department but may work on several projects, which are not necessarily controlled by the same department. We keep track of the number of hours per week that an employee works on each project. We also keep track of the direct supervisor of each employee. 4. We want to keep track of the dependents ...
Syllabus - Ahmadu Bello University
... Students work in small teams to design and implement real life database systems. Students use ER diagram for conceptual modeling. For implementation, students learn and use an appropriate relational database management system. Students may also implement, using some procedural language, the Select a ...
... Students work in small teams to design and implement real life database systems. Students use ER diagram for conceptual modeling. For implementation, students learn and use an appropriate relational database management system. Students may also implement, using some procedural language, the Select a ...
Chapter 17: Recovery System
... Recovery With Concurrent Transactions (Cont.) Checkpoints for concurrent transactions: ...
... Recovery With Concurrent Transactions (Cont.) Checkpoints for concurrent transactions: ...
Installing Oracle Software and Creating a Database
... Sheila is unable to make changes to the data in the EMPLOYEES table because of a lock placed by another session. She waits a reasonable amount of time for the lock to be released. However, when the data continues to be locked, she decides to terminate the blocking session so that she can proceed. ...
... Sheila is unable to make changes to the data in the EMPLOYEES table because of a lock placed by another session. She waits a reasonable amount of time for the lock to be released. However, when the data continues to be locked, she decides to terminate the blocking session so that she can proceed. ...
Introduction to Azure SQL Databases
... Create database in seconds. Code near data. Guaranteed predictable performance. Easily scalable. Lower price. Built-in HA, backup and restore ...
... Create database in seconds. Code near data. Guaranteed predictable performance. Easily scalable. Lower price. Built-in HA, backup and restore ...
Introduction to Access PowerPoint
... Database Terms Database files consist of tables. table: a collection of information in a database about a specific topic (such as student information) can have one table in a database file or several tables which consist of fields and records fields: individual units of a table categories of inform ...
... Database Terms Database files consist of tables. table: a collection of information in a database about a specific topic (such as student information) can have one table in a database file or several tables which consist of fields and records fields: individual units of a table categories of inform ...
Miami University
... RENTAL (video-number, customer-account-no, customer-name, customer-address, rental-date, due-date) Candidate keys: (1) {video-number, customer-account-no, rental-date} (2) {video-number, customer-name, rental-date} The data names given above are reasonably descriptive, and should reflect their meani ...
... RENTAL (video-number, customer-account-no, customer-name, customer-address, rental-date, due-date) Candidate keys: (1) {video-number, customer-account-no, rental-date} (2) {video-number, customer-name, rental-date} The data names given above are reasonably descriptive, and should reflect their meani ...
1-Intoduction
... DBMS used to maintain, query large datasets Benefits include recovery from system crashes, concurrent access, quick application development, data integrity and security ...
... DBMS used to maintain, query large datasets Benefits include recovery from system crashes, concurrent access, quick application development, data integrity and security ...
slides - CS 491/591: Cloud Computing
... • Three desirable, and expected properties of real-world services • Brewer states that it is impossible to guarantee all three ...
... • Three desirable, and expected properties of real-world services • Brewer states that it is impossible to guarantee all three ...
Q4 – How do database applications make databases more useful?
... Database application programs process logic specific to a given business need. For example, a program could track backordered items and hold a customer order until the items are ready to ship. Application programs enable database processing over the Internet as the figure below shows. Users acce ...
... Database application programs process logic specific to a given business need. For example, a program could track backordered items and hold a customer order until the items are ready to ship. Application programs enable database processing over the Internet as the figure below shows. Users acce ...
Document
... If Sally = (max)(min) and Joe = (del)(ins) are each transactions, and Sally runs with isolation level SERIALIZABLE, then she will see the database either before or after Joe runs, but not in the middle. It’s up to the DBMS vendor to figure out how to do that, e.g.: ...
... If Sally = (max)(min) and Joe = (del)(ins) are each transactions, and Sally runs with isolation level SERIALIZABLE, then she will see the database either before or after Joe runs, but not in the middle. It’s up to the DBMS vendor to figure out how to do that, e.g.: ...
SQL Constraints and Triggers
... When the event happens, the system will check the constraint, and if satisfied, will perform the action. NOTE: triggers may cause cascading effects. Database vendors did not wait for standards with triggers! ...
... When the event happens, the system will check the constraint, and if satisfied, will perform the action. NOTE: triggers may cause cascading effects. Database vendors did not wait for standards with triggers! ...
Universitatea POLITEHNICA din Bucuresti
... management systems (SQL Server, Oracle, MySQL, Microsoft Access). The students are involved in design and implementation of databases and applications using specific languages and interfaces (SQL, Transact-SQL, PL/SQL, ODBC, JDBC). 3. SPECIFIC COMPETENCIES The main purpose of this subject is to deve ...
... management systems (SQL Server, Oracle, MySQL, Microsoft Access). The students are involved in design and implementation of databases and applications using specific languages and interfaces (SQL, Transact-SQL, PL/SQL, ODBC, JDBC). 3. SPECIFIC COMPETENCIES The main purpose of this subject is to deve ...
Database
... Very big systems, but easy to use Common features: Relational model SQL as the query language Server-client architecture ...
... Very big systems, but easy to use Common features: Relational model SQL as the query language Server-client architecture ...
MIS 301- Database
... Restore/Rerun–reprocess transactions against the backup Transaction Integrity–commit or abort all transaction changes Backward Recovery (Rollback)–apply before ...
... Restore/Rerun–reprocess transactions against the backup Transaction Integrity–commit or abort all transaction changes Backward Recovery (Rollback)–apply before ...
Entity Relationship Diagram (ERD)
... • Entities and attributes define the columns of data in the database. • Entity- the subject of the table, i.e. “Vehicles.”. • Attributes- properties that describe the entity, i.e. “Mileage.” • Together, entities and attributes become tables organized by columns and rows. • Each table will contain a ...
... • Entities and attributes define the columns of data in the database. • Entity- the subject of the table, i.e. “Vehicles.”. • Attributes- properties that describe the entity, i.e. “Mileage.” • Together, entities and attributes become tables organized by columns and rows. • Each table will contain a ...
Comdb2 Bloomberg`s Highly Available Relational Database System
... This is a hybrid system using locking for some functions, while adhering to a more traditional OCC approach for others. In order to detect Write-Write conflicts, Comdb2 uses a form of deferred 2PL to allow for concurrent validation without a critical section [33]. This is based on the notion of a ge ...
... This is a hybrid system using locking for some functions, while adhering to a more traditional OCC approach for others. In order to detect Write-Write conflicts, Comdb2 uses a form of deferred 2PL to allow for concurrent validation without a critical section [33]. This is based on the notion of a ge ...
CS 7260 Course Report
... Offerings this past year (number of sections / enrollments): Fall 2015: N/A Spring 2016: 1/19 Summer 2016: N/A Overall success rate this past year: 100% (16A, 3B) Consistent with permanent schedule: N/A Recommendations for changes to permanent schedule: NON Recommendations for changes to course desc ...
... Offerings this past year (number of sections / enrollments): Fall 2015: N/A Spring 2016: 1/19 Summer 2016: N/A Overall success rate this past year: 100% (16A, 3B) Consistent with permanent schedule: N/A Recommendations for changes to permanent schedule: NON Recommendations for changes to course desc ...
IT Boxing Championship
... • Storing of new objects using the set method • object graph is traversed and all referenced objects are stored • Updating of existing objects using the set method • by default update depth is set to one • only primitive and string values are updated • object graph is not traversed for reasons of pe ...
... • Storing of new objects using the set method • object graph is traversed and all referenced objects are stored • Updating of existing objects using the set method • by default update depth is set to one • only primitive and string values are updated • object graph is not traversed for reasons of pe ...
Transactions
... Why not use the Operating System for the task?? - DBMS may be able to anticipate access patterns - Hence, may also be able to perform prefetching -DBMS needs the ability to force pages to disk, for recovery purposes - need fine grained control for transactions ...
... Why not use the Operating System for the task?? - DBMS may be able to anticipate access patterns - Hence, may also be able to perform prefetching -DBMS needs the ability to force pages to disk, for recovery purposes - need fine grained control for transactions ...
T - VUB STAR lab
... hence no waits. Instead there are rollbacks. In order to ensure such behavior, the protocol maintains for each data item Q two timestamp values: W-timestamp(Q) is the latest (youngest, largest) time-stamp of any transaction that executed write(Q) successfully. R-timestamp(Q) is the latest time ...
... hence no waits. Instead there are rollbacks. In order to ensure such behavior, the protocol maintains for each data item Q two timestamp values: W-timestamp(Q) is the latest (youngest, largest) time-stamp of any transaction that executed write(Q) successfully. R-timestamp(Q) is the latest time ...
CUSTOMER_CODE SMUDE DIVISION_CODE SMUDE
... data that should be either read/Written is first copied to the buffer cache and the read/write operation is carried out on the data that is currently on the Buffer Cache. The edited data is updated on the disc by the buffer manager only if the in-memory cache has not been referenced for some time. W ...
... data that should be either read/Written is first copied to the buffer cache and the read/write operation is carried out on the data that is currently on the Buffer Cache. The edited data is updated on the disc by the buffer manager only if the in-memory cache has not been referenced for some time. W ...