UNIVERSITY OF NAIROBI SCHOOL OF COMPUTING AND INFORMATICS
... In the recent past we have seen people and organizations appreciate the use of Information and Communication Technology (ICT), as this happens massive data has been generated, replicated and stored for future use. These dataset has grown to unimaginable size the I.T experts 10 years ago couldn’t hav ...
... In the recent past we have seen people and organizations appreciate the use of Information and Communication Technology (ICT), as this happens massive data has been generated, replicated and stored for future use. These dataset has grown to unimaginable size the I.T experts 10 years ago couldn’t hav ...
A transaction
... – Programmer makes sure a txn takes a consistent state to a consistent state – The system makes sure that the txn is atomic ...
... – Programmer makes sure a txn takes a consistent state to a consistent state – The system makes sure that the txn is atomic ...
Fault-Based Testing of Database Application Programs with
... instances. Intuitively, when the failure is due to a faulty SQL statement, techniques to reveal a failure at the SQL statement level should be more cost effective than those at the database instance level. In view of the above, among other problems in testing DB applications [20], there are two majo ...
... instances. Intuitively, when the failure is due to a faulty SQL statement, techniques to reveal a failure at the SQL statement level should be more cost effective than those at the database instance level. In view of the above, among other problems in testing DB applications [20], there are two majo ...
Full Text – Connection
... For SQL full text, the system field "SYSRELEVANCE" is required for the display of hit ratios (TRHits resp. TRHitGraph). If this field is not existing, hit ratios cannot be displayed. By default, the hit with the highest relevance is normalized to 100 and the other hits are adjusted to this calculati ...
... For SQL full text, the system field "SYSRELEVANCE" is required for the display of hit ratios (TRHits resp. TRHitGraph). If this field is not existing, hit ratios cannot be displayed. By default, the hit with the highest relevance is normalized to 100 and the other hits are adjusted to this calculati ...
CH9
... A shared lock is issued when a transaction wants to read data from the database and no exclusive lock is held on that data item. ...
... A shared lock is issued when a transaction wants to read data from the database and no exclusive lock is held on that data item. ...
What Is a Database?
... 1961- The first generalized DBMS-GEs Integrated Data Store (IDS) designed by Bachman. THE 70s – database technology experienced rapid growth. 1970- The relational model is developed by Ted Codd, an IBM research fellow. 1971- CODASYL Database Task Group Report. 1975- ACM Special Interest Group on Man ...
... 1961- The first generalized DBMS-GEs Integrated Data Store (IDS) designed by Bachman. THE 70s – database technology experienced rapid growth. 1970- The relational model is developed by Ted Codd, an IBM research fellow. 1971- CODASYL Database Task Group Report. 1975- ACM Special Interest Group on Man ...
Table of Content - California State University, Long Beach
... referenced table. Is the reverse true? (2) Within one table, is there any definite relationship between its primary key and foreign key? (3) In one table, can there be multiple foreign keys? Secondary key IS 380 Lecture Notes ...
... referenced table. Is the reverse true? (2) Within one table, is there any definite relationship between its primary key and foreign key? (3) In one table, can there be multiple foreign keys? Secondary key IS 380 Lecture Notes ...
branch-name
... involving the operation, +, –, , and /, and operating on constants or attributes of tuples. The query: select loan-number, branch-name, amount 100 from loan would return a relation which is the same as the loan relations, except that the attribute amount is multiplied by 100. ...
... involving the operation, +, –, , and /, and operating on constants or attributes of tuples. The query: select loan-number, branch-name, amount 100 from loan would return a relation which is the same as the loan relations, except that the attribute amount is multiplied by 100. ...
Set Transaction Statement
... Oracle 9i (using sqlplus) SQLPLUS> commit; SQLPLUS> select * from proj; // new trasaction is began SQLPLUS> insert into proj values (1, ‘Proj_X’, 500, ‘John’); SQLPLUS> commit; // the transaction is committed and ended. ...
... Oracle 9i (using sqlplus) SQLPLUS> commit; SQLPLUS> select * from proj; // new trasaction is began SQLPLUS> insert into proj values (1, ‘Proj_X’, 500, ‘John’); SQLPLUS> commit; // the transaction is committed and ended. ...
slides
... possibilities to consider. • Common approach: – Consider subsets of the involved relations, and the conditions that apply to each subset. – Estimate the cost of evaluating the σπ×− expression restricted to this subset. – Need to distinguish between different forms of the output (sorted, unsorted). ...
... possibilities to consider. • Common approach: – Consider subsets of the involved relations, and the conditions that apply to each subset. – Estimate the cost of evaluating the σπ×− expression restricted to this subset. – Need to distinguish between different forms of the output (sorted, unsorted). ...
09sDch10
... What you need if you want to connect to a database OLE(Object Linking and Embedding) • allow you to connect to data sources in general, and not just databases. You can use it, for example, to connect to text files, SQL Server, email, and a whole lot more Place a button on your form. Change the ...
... What you need if you want to connect to a database OLE(Object Linking and Embedding) • allow you to connect to data sources in general, and not just databases. You can use it, for example, to connect to text files, SQL Server, email, and a whole lot more Place a button on your form. Change the ...
Evaluation of Alternative
... such as the relational database management system (RDBMS) and the web search engine. However, historically, these two fields have largely developed independently even though they share one overriding objective, management of data. We know that traditional IR systems do not take advantage of structur ...
... such as the relational database management system (RDBMS) and the web search engine. However, historically, these two fields have largely developed independently even though they share one overriding objective, management of data. We know that traditional IR systems do not take advantage of structur ...
Document
... • List database types (e.g., flat file, relational), and identify their uses and architectures • Describe the types of database management system (DBMS), and explain the benefits and limitations of each DBMS type • Analyze and select appropriate database designs, and identify the solution that addre ...
... • List database types (e.g., flat file, relational), and identify their uses and architectures • Describe the types of database management system (DBMS), and explain the benefits and limitations of each DBMS type • Analyze and select appropriate database designs, and identify the solution that addre ...
The Terrestrial BR IFIC Workshop
... • if the users have administrator privilege, they may run brific.exe (the navigation menu) “as administrator” in order to be able to install from the navigation menu • if the users do not have administrator privilege, they must use the installer.bat script, found in \Packages\Windows\Disk1\InstData ...
... • if the users have administrator privilege, they may run brific.exe (the navigation menu) “as administrator” in order to be able to install from the navigation menu • if the users do not have administrator privilege, they must use the installer.bat script, found in \Packages\Windows\Disk1\InstData ...
Understanding Computers, 11/e, Chapter 14
... Single-user database systems: designed to be accessed by one user Multiuser database systems: designed to be accessed by multiple users (most business databases today) Client-server database systems: has both clients and at least one server Understanding Computers, 11th Edition ...
... Single-user database systems: designed to be accessed by one user Multiuser database systems: designed to be accessed by multiple users (most business databases today) Client-server database systems: has both clients and at least one server Understanding Computers, 11th Edition ...
slides
... Cache isolation, type, size, expiry, coordination Refreshing • By query (use-case) or descriptor (always) ...
... Cache isolation, type, size, expiry, coordination Refreshing • By query (use-case) or descriptor (always) ...
Kroenke-DBC-e02-PP
... • A relational database stores information in tables. Each informational topic is stored in its own table • In essence, a relational database will break-up a list into several parts. One part for each theme in the list • A Project List would be divided into a CUSTOMER Table, a PROJECT Table, and a P ...
... • A relational database stores information in tables. Each informational topic is stored in its own table • In essence, a relational database will break-up a list into several parts. One part for each theme in the list • A Project List would be divided into a CUSTOMER Table, a PROJECT Table, and a P ...
Document
... • XLA can track changes to both Tables and Materialized Views • XLA obtains updates directly from transaction log buffer or log files • Only records for committed transactions are returned ...
... • XLA can track changes to both Tables and Materialized Views • XLA obtains updates directly from transaction log buffer or log files • Only records for committed transactions are returned ...
Scalable Data Management in the Cloud: Research Challenges
... /* get_friends() method has to reconcile results returned by get_friends() because there may be data inconsistency due to a conflict because a change that was applied from the message queue is contradictory to a subsequent change by the user. In this case, status is a bitflag where all conflicts are ...
... /* get_friends() method has to reconcile results returned by get_friends() because there may be data inconsistency due to a conflict because a change that was applied from the message queue is contradictory to a subsequent change by the user. In this case, status is a bitflag where all conflicts are ...
grant select on
... operations on the database that are applied by a certain user throughout each login session. To keep a record of all updates applied to the database and of ...
... operations on the database that are applied by a certain user throughout each login session. To keep a record of all updates applied to the database and of ...
Exploiting NoSQL Like Never Before
... • Version command by default binds to mongo instances defined functions • So if an admin blocks the “this” pointer • function(){return this} ...
... • Version command by default binds to mongo instances defined functions • So if an admin blocks the “this” pointer • function(){return this} ...
Cracking the Database Store
... point-selections (attr θ cst with θ in {=, ! =}) and doublesided range predicates attr ∈ [low, high]. To re-gain the consecutive ranges property, we propose a second version a selection-cracking that yields three pieces: attr < low, attr ∈ [low, high], and attr > high In this scenario, pointselectio ...
... point-selections (attr θ cst with θ in {=, ! =}) and doublesided range predicates attr ∈ [low, high]. To re-gain the consecutive ranges property, we propose a second version a selection-cracking that yields three pieces: attr < low, attr ∈ [low, high], and attr > high In this scenario, pointselectio ...
Document
... Handled by network transmission control protocols such as TCP-IP Handled by network protocols, by routing messages via alternative links ...
... Handled by network transmission control protocols such as TCP-IP Handled by network protocols, by routing messages via alternative links ...
Chapter 19: Distributed Databases
... Handled by network transmission control protocols such as TCP-IP Handled by network protocols, by routing messages via alternative links ...
... Handled by network transmission control protocols such as TCP-IP Handled by network protocols, by routing messages via alternative links ...