Slide 1
... 2. The DAO would obtain an entity manager and use its functionality to fetch one or more objects from the database 3. Your application can then use the fetched object(s) as it wishes 4. If it changes it, no need to store it again (unless it becomes detached) ...
... 2. The DAO would obtain an entity manager and use its functionality to fetch one or more objects from the database 3. Your application can then use the fetched object(s) as it wishes 4. If it changes it, no need to store it again (unless it becomes detached) ...
Photoshop: Creative Uses
... 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 ...
l1-introduction
... • A collection of restricted/specialized database models to allow for scalability / distribution – Key-value store: specialized for hash tables – Document store: similar to key-value, but values have an internal structure (e.g., XML, JSON) – Graph databases: specialized for graphs with “nodes” and “ ...
... • A collection of restricted/specialized database models to allow for scalability / distribution – Key-value store: specialized for hash tables – Document store: similar to key-value, but values have an internal structure (e.g., XML, JSON) – Graph databases: specialized for graphs with “nodes” and “ ...
Oracle Data Dictionary
... The data dictionary consists of two levels: • The internal level contains all base tables that are used by the various DBMS software components and they are normally not accessible by end users. • The external level provides numerous views on these base tables to access information about objects and ...
... The data dictionary consists of two levels: • The internal level contains all base tables that are used by the various DBMS software components and they are normally not accessible by end users. • The external level provides numerous views on these base tables to access information about objects and ...
tia5e_ch11_ppt
... • Affinity grouping or association rules – Determine which data goes together ...
... • Affinity grouping or association rules – Determine which data goes together ...
review - Novella
... Compacting a database means that unnecessary entries are removed and the remaining items are reorganized into a smaller space on the hard disk. Compacting, therefore, makes more efficient use of disk storage and also helps the database to run faster. Compacting should be done on a regular basis for ...
... Compacting a database means that unnecessary entries are removed and the remaining items are reorganized into a smaller space on the hard disk. Compacting, therefore, makes more efficient use of disk storage and also helps the database to run faster. Compacting should be done on a regular basis for ...
Slides - SEAS - University of Pennsylvania
... Transformation reverse engineering: create data instances to determine what a Perl or other tool is doing when converting from one format to another ...
... Transformation reverse engineering: create data instances to determine what a Perl or other tool is doing when converting from one format to another ...
transfer the PecStar database to a new server
... The PecStar software has a database manager utility to help database maintenance, which can be used to perform backup, restore, export, import, clear, auto-export, and data sync tasks. Please follow the steps below: ...
... The PecStar software has a database manager utility to help database maintenance, which can be used to perform backup, restore, export, import, clear, auto-export, and data sync tasks. Please follow the steps below: ...
Distributed Databases - Computer Science, Stony Brook University
... – If no data is stored at headquarters, the monthly mailing requires that 100,000 rows be transmitted in a single day, which might clog the network – If we replicate, the time to register a new customer might suffer because of the remote update • But this update can be done by a separate transaction ...
... – If no data is stored at headquarters, the monthly mailing requires that 100,000 rows be transmitted in a single day, which might clog the network – If we replicate, the time to register a new customer might suffer because of the remote update • But this update can be done by a separate transaction ...
Ramesh Babu Y 248-522
... Vechicle Tracking : Vechicle tracking system is a unique Fleet management system in Mining operations. In this All the trucks are fitted with a GPS enabled devices, which enables each & every tripper to be monitored with no of trips, Speed of the vehicle at a particular time, Positional placement of ...
... Vechicle Tracking : Vechicle tracking system is a unique Fleet management system in Mining operations. In this All the trucks are fitted with a GPS enabled devices, which enables each & every tripper to be monitored with no of trips, Speed of the vehicle at a particular time, Positional placement of ...
SQL code smells
... Defining a table column without explicitly specifying whether it is nullable The default nullability for a database’s columns can be altered as a setting. Therefore one cannot assume whether a column will default to NULL or NOT NULL. It is safest to specify it in the column definition, and it is ess ...
... Defining a table column without explicitly specifying whether it is nullable The default nullability for a database’s columns can be altered as a setting. Therefore one cannot assume whether a column will default to NULL or NOT NULL. It is safest to specify it in the column definition, and it is ess ...
SQL Tutorial Basics of the SELECT Statement
... First, let's discuss the concept of keys. A primary key is a column or set of columns that uniquely identifies the rest of the data in any given row. For example, in the AntiqueOwners table, the OwnerID column uniquely identifies that row. This means two things: no two rows can have the same OwnerID ...
... First, let's discuss the concept of keys. A primary key is a column or set of columns that uniquely identifies the rest of the data in any given row. For example, in the AntiqueOwners table, the OwnerID column uniquely identifies that row. This means two things: no two rows can have the same OwnerID ...
Flashback Transaction Query
... Provides a way to audit the rows of a table and retrieve information about the transactions that changed the rows. Retrieve all committed versions of the rows that exist or ever existed between the time the query was issued and a point in time in the past Use the transaction ID to perform transactio ...
... Provides a way to audit the rows of a table and retrieve information about the transactions that changed the rows. Retrieve all committed versions of the rows that exist or ever existed between the time the query was issued and a point in time in the past Use the transaction ID to perform transactio ...
6340-11-Recovery
... Two tables are required for implementing this protocol: Active table: All active transactions are entered in this table. Commit table: Transactions to be committed are entered in this table. During recovery, all transactions of the commit table are redone and all transactions of active tables are ig ...
... Two tables are required for implementing this protocol: Active table: All active transactions are entered in this table. Commit table: Transactions to be committed are entered in this table. During recovery, all transactions of the commit table are redone and all transactions of active tables are ig ...
Critical Link!
... - processing of sensor queries and access to the sensor network are separated. - data is extracted from the sensor network in a predefined way and is stored in a database located on a unique frontend server. - it periodically retrieves data from the sensor network and stores the data at a centralize ...
... - processing of sensor queries and access to the sensor network are separated. - data is extracted from the sensor network in a predefined way and is stored in a database located on a unique frontend server. - it periodically retrieves data from the sensor network and stores the data at a centralize ...
CONSTRAINTS AND UPDATES
... value of PK for some tuple t1 in the current state r1(R1) or it is NULL ...
... value of PK for some tuple t1 in the current state r1(R1) or it is NULL ...
Active Data Guard at CERN
... • Fast upgrades and hardware migrations • Detection of lost writes • Automatic block media recovery ...
... • Fast upgrades and hardware migrations • Detection of lost writes • Automatic block media recovery ...
Chapter 12 Generate Database Tables
... that the Server Generator has produced. These files contain the commands that will create the database when you execute them. You can run a generated DDL script from within the Design Editor or directly from the SQL*Plus prompt. You can build a database incrementally, or in a single step. To execute ...
... that the Server Generator has produced. These files contain the commands that will create the database when you execute them. You can run a generated DDL script from within the Design Editor or directly from the SQL*Plus prompt. You can build a database incrementally, or in a single step. To execute ...
Slide I
... – Same data is held by different programs. – Wasted space and potentially different values and/or different formats for the same item. ...
... – Same data is held by different programs. – Wasted space and potentially different values and/or different formats for the same item. ...
