1. Database Fundamentals
... where data organisation is transparent to the users or application programs which feed off data. If, for instance, a change is made to some part of the underlying database, no application programs using affected data should need to be changed. Also, if a change is made to some part of an application ...
... where data organisation is transparent to the users or application programs which feed off data. If, for instance, a change is made to some part of the underlying database, no application programs using affected data should need to be changed. Also, if a change is made to some part of an application ...
Enterprise Java Beans
... appear to be a collection of Java objects – Eliminates distinction between data from a database and any other source – All information is accessed through Java objects – All SQL is cleanly encapsulated in Java objects true object-oriented programming high reusability – Database objects work with ...
... appear to be a collection of Java objects – Eliminates distinction between data from a database and any other source – All information is accessed through Java objects – All SQL is cleanly encapsulated in Java objects true object-oriented programming high reusability – Database objects work with ...
Enterprise JavaBeans - Amazon Web Services
... appear to be a collection of Java objects – Eliminates distinction between data from a database and any other source – All information is accessed through Java objects – All SQL is cleanly encapsulated in Java objects true object-oriented programming high reusability – Database objects work with ...
... appear to be a collection of Java objects – Eliminates distinction between data from a database and any other source – All information is accessed through Java objects – All SQL is cleanly encapsulated in Java objects true object-oriented programming high reusability – Database objects work with ...
Performance Tuning
... The join queries in the benchmark were designed to study the effect of three different factors: 1) The impact of the complexity of a query on the relative performance of the different database systems. 2) The performance of the join algorithms used by the ...
... The join queries in the benchmark were designed to study the effect of three different factors: 1) The impact of the complexity of a query on the relative performance of the different database systems. 2) The performance of the join algorithms used by the ...
ECDL / ICDL Using Databases Level 1 Syllabus Version 1.0 (UK)
... DB1.4.2 Locate Information in a Database Table ...
... DB1.4.2 Locate Information in a Database Table ...
downloading
... The information in this manual is intended primarily for application developers; additionally, it can be useful for advanced users of rasdaman applications and for database administrators. ...
... The information in this manual is intended primarily for application developers; additionally, it can be useful for advanced users of rasdaman applications and for database administrators. ...
JDBC - Amazon Web Services
... can use a ‘Statement’ object to execute it. These SQL statements are compiled each time they are executed. • If you want to pre-compile a SQL statement once and execute it multiple times, use a ‘PreparedStatement’ object. It lets you specify a SQL statement in the form of a string that uses placehol ...
... can use a ‘Statement’ object to execute it. These SQL statements are compiled each time they are executed. • If you want to pre-compile a SQL statement once and execute it multiple times, use a ‘PreparedStatement’ object. It lets you specify a SQL statement in the form of a string that uses placehol ...
6231B_06
... Lab 6: Backup of SQL Server Databases • Exercise 1: Investigate backup compression • Exercise 2: Transaction log backup • Exercise 3: Differential backup • Exercise 4: Copy only backup • Challenge Exercise 5: Partial backup (Only if time permits) ...
... Lab 6: Backup of SQL Server Databases • Exercise 1: Investigate backup compression • Exercise 2: Transaction log backup • Exercise 3: Differential backup • Exercise 4: Copy only backup • Challenge Exercise 5: Partial backup (Only if time permits) ...
Document
... and only if there exists some item Q accessed by both li and lj, and at least one of these instructions wrote Q. 1. li = read(Q), lj = read(Q). 2. li = read(Q), lj = write(Q). 3. li = write(Q), lj = read(Q). ...
... and only if there exists some item Q accessed by both li and lj, and at least one of these instructions wrote Q. 1. li = read(Q), lj = read(Q). 2. li = read(Q), lj = write(Q). 3. li = write(Q), lj = read(Q). ...
Coupling Logic Programming with Relational Databases
... compared and their advantages and disadvantages are discussed. For this discussion and evaluation we implemented different coupling architectures using the Yap Prolog compiler and the MySQL relational database management system. Few aspects are, however, strictly dependent on these two systems, and ...
... compared and their advantages and disadvantages are discussed. For this discussion and evaluation we implemented different coupling architectures using the Yap Prolog compiler and the MySQL relational database management system. Few aspects are, however, strictly dependent on these two systems, and ...
Here - NYU Computer Science Department
... D[h(k)], or if there are more than one such integer to a location D[h(k)], create a linked list of locations “hanging” off this D[h(k)] Probabilistically, almost always, most of the the locations D[h(k)], will be ...
... D[h(k)], or if there are more than one such integer to a location D[h(k)], create a linked list of locations “hanging” off this D[h(k)] Probabilistically, almost always, most of the the locations D[h(k)], will be ...
slides
... andd only written to the server database state on commit (often checking first whether this is allowed) Data needed for a query may be able to be read directly from the cache. What are the advantages of cache-based mechanisms? Copyright © Ellis Cohen, 2002-2005 ...
... andd only written to the server database state on commit (often checking first whether this is allowed) Data needed for a query may be able to be read directly from the cache. What are the advantages of cache-based mechanisms? Copyright © Ellis Cohen, 2002-2005 ...
Referential Integrity in Oracle Rdb
... SQL nomenclature for this feature. Rdb implemented three types of constraints - valid if, verb time and commit time. Traces of this terminology exist still in the Rdb product, even in the SQL syntax. This technical note provides an overview of the referential integrity features available in the Orac ...
... SQL nomenclature for this feature. Rdb implemented three types of constraints - valid if, verb time and commit time. Traces of this terminology exist still in the Rdb product, even in the SQL syntax. This technical note provides an overview of the referential integrity features available in the Orac ...
PDF
... Null values generally indicate data that is unknown, not applicable, or to be added later. For example, a customer's middle initial may not be known at the time the customer places an order. Note the following about null values: To test for null values in a query, use IS NULL or IS NOT NULL in the W ...
... Null values generally indicate data that is unknown, not applicable, or to be added later. For example, a customer's middle initial may not be known at the time the customer places an order. Note the following about null values: To test for null values in a query, use IS NULL or IS NOT NULL in the W ...
An Adequate Design for Large Data Warehouse
... hoc nature. Should an appropriate index structure be selected, the time required for query response will decrease extensively. To best of our knowledge, to date no comprehensive guideline has been provided for Data Warehouse analysts to opt for suitable indices. Conventionally, most experts go for t ...
... hoc nature. Should an appropriate index structure be selected, the time required for query response will decrease extensively. To best of our knowledge, to date no comprehensive guideline has been provided for Data Warehouse analysts to opt for suitable indices. Conventionally, most experts go for t ...
Document
... Pitfalls of Lock-Based Protocols (Cont.) The potential for deadlock exists in most locking protocols. Deadlocks ...
... Pitfalls of Lock-Based Protocols (Cont.) The potential for deadlock exists in most locking protocols. Deadlocks ...
How To Handle Missing Information Without Using Nulls
... Updating the Database: Solution “Multiple Assignment”: doing several updating operations in a single “mouthful”. For example: INSERT_TUPLE INTO CALLED { Id 1236, Name ‘Cindy’ } , INSERT_TUPLE INTO JOB_UNK { Id 1236 } , INSERT_TUPLE INTO EARNS { Id 1236, Salary 70000 } ; Note very carefully the punc ...
... Updating the Database: Solution “Multiple Assignment”: doing several updating operations in a single “mouthful”. For example: INSERT_TUPLE INTO CALLED { Id 1236, Name ‘Cindy’ } , INSERT_TUPLE INTO JOB_UNK { Id 1236 } , INSERT_TUPLE INTO EARNS { Id 1236, Salary 70000 } ; Note very carefully the punc ...
Subject: Database Management Systems
... reduce that value by the amount being withdrawn, and write the result back. If the two programs run concurrently, they may both read the value $500, and write back $450 and $400, respectively. Depending on which one writes the value last, the account may contain either $450 or $400, rather than the ...
... reduce that value by the amount being withdrawn, and write the result back. If the two programs run concurrently, they may both read the value $500, and write back $450 and $400, respectively. Depending on which one writes the value last, the account may contain either $450 or $400, rather than the ...
Simplify Printing v5
... I have requested a license reactivation but have received no response from triCerat .......................119 ...
... I have requested a license reactivation but have received no response from triCerat .......................119 ...
a.netcominfo.com
... can use a ‘Statement’ object to execute it. These SQL statements are compiled each time they are executed. • If you want to pre-compile a SQL statement once and execute it multiple times, use a ‘PreparedStatement’ object. It lets you specify a SQL statement in the form of a string that uses placehol ...
... can use a ‘Statement’ object to execute it. These SQL statements are compiled each time they are executed. • If you want to pre-compile a SQL statement once and execute it multiple times, use a ‘PreparedStatement’ object. It lets you specify a SQL statement in the form of a string that uses placehol ...
Role Transition Best Practices: Data Guard and Active Data
... You can view the current delay setting on the primary database by referencing the broker property DelayMins from the broker ‘show database verbose’ output or by querying the DELAY_MINS column
of the V$ARCHIVE_DEST view.
» In Oracle Database versions 11.2.0.2 through 11.2.0.3 for phy ...
... You can view the current delay setting on the primary database by referencing the broker property DelayMins from the broker ‘show database
IBM DB2 spatial - EPPS Academic Computing
... database that includes some spatial functionality; and ArcSDE, a spatial data engine from ESRI, the market leader in GIS applications. Following is a general introduction that provides an overview of each system. Once a separate extension to IBM DB2 database, Spatial Extender is now integrated withi ...
... database that includes some spatial functionality; and ArcSDE, a spatial data engine from ESRI, the market leader in GIS applications. Following is a general introduction that provides an overview of each system. Once a separate extension to IBM DB2 database, Spatial Extender is now integrated withi ...