Chapter 1: Introduction - Perancangan Basis Data
... become “buried” in program code rather than being stated explicitly Hard to add new constraints or change existing ones ...
... become “buried” in program code rather than being stated explicitly Hard to add new constraints or change existing ones ...
ppt
... • Discuss some steps to take in building a database • Discuss practical issues in creating archivable versions of databases ...
... • Discuss some steps to take in building a database • Discuss practical issues in creating archivable versions of databases ...
Database-lecture 10
... In this example: the sub query is used in the having clause The example goal: to retrieve the number of projects for each employee who works on at least one project in the works_on table. ...
... In this example: the sub query is used in the having clause The example goal: to retrieve the number of projects for each employee who works on at least one project in the works_on table. ...
White Paper
... events, such as orders, payments, invoices, customer interactions, et cetera. The events-type tables tend to grow fastest, become largest, and dominate SQL tuning problems, partly because they are so large as to be hard to cache. Fortunately, as we will see, it is unnecessary to cache all events, on ...
... events, such as orders, payments, invoices, customer interactions, et cetera. The events-type tables tend to grow fastest, become largest, and dominate SQL tuning problems, partly because they are so large as to be hard to cache. Fortunately, as we will see, it is unnecessary to cache all events, on ...
queryProcessing
... Use index to find qualifying data entries, then retrieve corresponding data records. Cost of finding the starting page is 2 or 3 I/Os; for a clustered index add one more I/O; for an unclustered index add one page per qualifying tuple. ...
... Use index to find qualifying data entries, then retrieve corresponding data records. Cost of finding the starting page is 2 or 3 I/Os; for a clustered index add one more I/O; for an unclustered index add one page per qualifying tuple. ...
- Prairie Systems Group, Limited
... De-normalized views Function-based views All complex data transformations in PL/SQL only! Effective utilization of: BULK operations CLOBs, XMLtype Other advanced data processing Single-round trip thinking 10 of 24 ...
... De-normalized views Function-based views All complex data transformations in PL/SQL only! Effective utilization of: BULK operations CLOBs, XMLtype Other advanced data processing Single-round trip thinking 10 of 24 ...
SQL Server “Sphinx”
... SQL Server Architecture SQL Server with SAP Performance Monitoring and Tuning ...
... SQL Server Architecture SQL Server with SAP Performance Monitoring and Tuning ...
Week05-BUAD283-XlmA
... Review business rules in order to verbally describe the relationship between tables Once the relationship has been established, you must then determine the numerical nature of the relationship, referred to as minimum and maximum cardinalities Normalize the database to ensure that the relational stru ...
... Review business rules in order to verbally describe the relationship between tables Once the relationship has been established, you must then determine the numerical nature of the relationship, referred to as minimum and maximum cardinalities Normalize the database to ensure that the relational stru ...
Lecture notes
... The class mailing list cs145-aut0708students is in effect a materialized view of the class enrollment in Axess. ...
... The class mailing list cs145-aut0708students is in effect a materialized view of the class enrollment in Axess. ...
Trumping Oracle Exadata
... companies recently evaluated Oracle’s Exadata against two Fusion Powered servers. Sometimes two can be bigger than Exa. ...
... companies recently evaluated Oracle’s Exadata against two Fusion Powered servers. Sometimes two can be bigger than Exa. ...
original - Kansas State University
... Indices offer substantial benefits when searching for records. When a file is modified, every index on the file must be updated, Updating indices imposes overhead on database modification. Sequential scan using primary index is efficient, but a sequential scan using a secondary index is expens ...
... Indices offer substantial benefits when searching for records. When a file is modified, every index on the file must be updated, Updating indices imposes overhead on database modification. Sequential scan using primary index is efficient, but a sequential scan using a secondary index is expens ...
Database
... – Need some way to back up databases and to restore in the event of a system failure that damages the database. – hot backups is the term used when users can back up databases while they are in use. Needed for applications which must run without interruption, and cannot be shut down for backups. ...
... – Need some way to back up databases and to restore in the event of a system failure that damages the database. – hot backups is the term used when users can back up databases while they are in use. Needed for applications which must run without interruption, and cannot be shut down for backups. ...
Mass Analysis of D0 Top Candidates
... algorihtms avoids the need to re-apply these alogorithms for each event selection pass Particle ID tables are small, making it possible to quickly eliminate events not having the desired set of physics objects Direct access to full mDST sample on DVD allows a mDST subset to be quickly generated for ...
... algorihtms avoids the need to re-apply these alogorithms for each event selection pass Particle ID tables are small, making it possible to quickly eliminate events not having the desired set of physics objects Direct access to full mDST sample on DVD allows a mDST subset to be quickly generated for ...
September 2010 - NVidia GPU Technology Conference
... A test case: genomic sequence data • Typical data-management scenario: – All data is maintained in file-system files – Processing software reads and writes files – “Database-like” operations (e.g. joins) are performed using command-line tools (e.g. Perl scripts) ...
... A test case: genomic sequence data • Typical data-management scenario: – All data is maintained in file-system files – Processing software reads and writes files – “Database-like” operations (e.g. joins) are performed using command-line tools (e.g. Perl scripts) ...
Physical Database Design for the Relational Database
... index will be a primary index; otherwise, index will be a clustering index. Each relation can only have either a primary index or a clustering index. Secondary indexes provide a mechanism for specifying an additional key for a base relation that can be used to retrieve data more efficiently. ...
... index will be a primary index; otherwise, index will be a clustering index. Each relation can only have either a primary index or a clustering index. Secondary indexes provide a mechanism for specifying an additional key for a base relation that can be used to retrieve data more efficiently. ...
database systems: dis 308
... Databases are part of our day to day lives. When we are registering as students, we are interacting with databases, when we go to the bank, pay our electricity bills or pay water bills our accounts are on a database, even when we are browsing the net; information is coming from several databases. Th ...
... Databases are part of our day to day lives. When we are registering as students, we are interacting with databases, when we go to the bank, pay our electricity bills or pay water bills our accounts are on a database, even when we are browsing the net; information is coming from several databases. Th ...
Interfacing possibilities in Microsoft Access, using external data
... database. You can create queries, forms, reports, macro commands and modules which will work with your attached table. You can modify only certain properties of the table. You cannot change the structure of the table you attached. For example, you cannot change the type or length of a field. But you ...
... database. You can create queries, forms, reports, macro commands and modules which will work with your attached table. You can modify only certain properties of the table. You cannot change the structure of the table you attached. For example, you cannot change the type or length of a field. But you ...
Recovery
... effects must be eleminated, i.e. all values that have been changed by the operations in the transaction must be restored. • Cascading rollback: when rollback is applied to a transaction T, we must apply rollback to all transactions S that have read item values that has been updated by T. We must the ...
... effects must be eleminated, i.e. all values that have been changed by the operations in the transaction must be restored. • Cascading rollback: when rollback is applied to a transaction T, we must apply rollback to all transactions S that have read item values that has been updated by T. We must the ...
