Object persistence design
... The most popular kind of database application. It is based on collection of tables, with each table having a primary key – a field(s) whose value is unique for every row of the table. The tables are related to each other by placing the primary key from one table into the related table as a foreign k ...
... The most popular kind of database application. It is based on collection of tables, with each table having a primary key – a field(s) whose value is unique for every row of the table. The tables are related to each other by placing the primary key from one table into the related table as a foreign k ...
Enterprise Data Modeling | ER/Studio Data Architect
... Trace Data Origins and Whereabouts to Enhance Data Integration and Accuracy With a clear understanding of where data originated and where it is used, organizations can be assured that they know what their data actually means and how it can best be utilized. The ER/Studio visual data lineage function ...
... Trace Data Origins and Whereabouts to Enhance Data Integration and Accuracy With a clear understanding of where data originated and where it is used, organizations can be assured that they know what their data actually means and how it can best be utilized. The ER/Studio visual data lineage function ...
The Relational Model
... The relational model is the most used data model for commercial data-processing because it is simple to use and to maintain. A relational data model is based on a collection of tables. The user of the database system may query these tables, insert new tuples, and update (modify) tuples. There are se ...
... The relational model is the most used data model for commercial data-processing because it is simple to use and to maintain. A relational data model is based on a collection of tables. The user of the database system may query these tables, insert new tuples, and update (modify) tuples. There are se ...
- TutorialsPoint
... A - A disconnected RowSet object is ad-hoc in nature. B - Whenever it requires retrieving data from the database, it establishes the connection and closes it upon finishing the required task. C - The data that is modified during disconnected state is updated after the connection is reestablished. D ...
... A - A disconnected RowSet object is ad-hoc in nature. B - Whenever it requires retrieving data from the database, it establishes the connection and closes it upon finishing the required task. C - The data that is modified during disconnected state is updated after the connection is reestablished. D ...
What is XML? - Pennsylvania State University
... Foreign Keys are used in other tables in order to maintain relationships between data values. By allowing us to split data into multiple related tables, foreign keys can help eliminate the anomalies described previously ...
... Foreign Keys are used in other tables in order to maintain relationships between data values. By allowing us to split data into multiple related tables, foreign keys can help eliminate the anomalies described previously ...
Create an Electronic Form Solution with DB2 pureXML and Lotus Forms
... We then show how the XML form data can be queried against in DB2 or by other applications such as Cognos BI. Let’s begin building our eForms solution. Create Database and Table (30 seconds) pureXML makes storing XML data easy. The steps to create a table with XML support are pretty much the same as ...
... We then show how the XML form data can be queried against in DB2 or by other applications such as Cognos BI. Let’s begin building our eForms solution. Create Database and Table (30 seconds) pureXML makes storing XML data easy. The steps to create a table with XML support are pretty much the same as ...
Notes
... • deduct from one account and credit to another If one steps succeeds and the other fails, database is in an inconsistent state Therefore, either both steps should succeed or neither should ...
... • deduct from one account and credit to another If one steps succeeds and the other fails, database is in an inconsistent state Therefore, either both steps should succeed or neither should ...
Android/SQLite (Powerpoint)
... Size – about 257 Kbytes Not a client/server architecture – Accessed via function calls from the application ...
... Size – about 257 Kbytes Not a client/server architecture – Accessed via function calls from the application ...
item-name - UCLA Computer Science
... SQL:1999 permits the user to specify where they should occur by using nulls first or nulls last, for instance select student-id, rank ( ) over (order by marks desc nulls last) as s-rank from student-marks ...
... SQL:1999 permits the user to specify where they should occur by using nulls first or nulls last, for instance select student-id, rank ( ) over (order by marks desc nulls last) as s-rank from student-marks ...
Singleton Pattern
... static Database* DB instance attributes… static Database* getDB() instance methods… ...
... static Database* DB instance attributes… static Database* getDB() instance methods… ...
ch11_Kroenke9
... database maintenance plan, e.g., scheduling database and log backups To recover a database with SQL Server – The database is restored from a prior database backup – Log after images are applied to the restored database – At the end of the log, changes from any transaction that failed to commit are ...
... database maintenance plan, e.g., scheduling database and log backups To recover a database with SQL Server – The database is restored from a prior database backup – Log after images are applied to the restored database – At the end of the log, changes from any transaction that failed to commit are ...
IMS1907 Database Systems - Monash University, Victoria, School of
... The ultimate measures of database performance are – response time to queries – the speed of updates We also need to consider – data accessibility, security, integrity – usability – recoverability Physical database design translates conceptual and external schemas into physical designs aimed at stori ...
... The ultimate measures of database performance are – response time to queries – the speed of updates We also need to consider – data accessibility, security, integrity – usability – recoverability Physical database design translates conceptual and external schemas into physical designs aimed at stori ...
Paper
... different application interfaces. Each such mapping is called a binding. Applications may call the Natix Engine Interface directly. However, for rapid application development, it is often desirable to have interface abstractions that are closer to the applications domain. An example for such a highe ...
... different application interfaces. Each such mapping is called a binding. Applications may call the Natix Engine Interface directly. However, for rapid application development, it is often desirable to have interface abstractions that are closer to the applications domain. An example for such a highe ...
Database Constraints
... – DBMS does not allow an application to insert a new row in the Sale table unless the row's CustID column contains the value of some existing CustID value in the Customer table. – Blocks any attempt to change the CustID column of a row in the Sale table to a value that doesn't exist in any row in th ...
... – DBMS does not allow an application to insert a new row in the Sale table unless the row's CustID column contains the value of some existing CustID value in the Customer table. – Blocks any attempt to change the CustID column of a row in the Sale table to a value that doesn't exist in any row in th ...
intro
... binds a list control (ListBox) or iterative control (Repeater) to one or more columns of data. ...
... binds a list control (ListBox) or iterative control (Repeater) to one or more columns of data. ...
Legal protection of databases in Europe and public
... • "The copyright protection of databases provided for by this Directive shall not extend to their contents and shall be without prejudice to any rights subsisting in those contents themselves." (art.3.2 Dir 110396) ...
... • "The copyright protection of databases provided for by this Directive shall not extend to their contents and shall be without prejudice to any rights subsisting in those contents themselves." (art.3.2 Dir 110396) ...
Managing the Oracle Database Instance
... Performing Database Recovery Opening a Database Data Recovery Advisor Loss of a Control File Loss of a Redo Log File Data Recovery Advisor Data Failures Listing Data Failures Data Recovery Advisor Views 26.06.14 Configuring for Recoverability Purpose of Backup and ...
... Performing Database Recovery Opening a Database Data Recovery Advisor Loss of a Control File Loss of a Redo Log File Data Recovery Advisor Data Failures Listing Data Failures Data Recovery Advisor Views 26.06.14 Configuring for Recoverability Purpose of Backup and ...
Analyzing moderately large data sets
... file() opens a connection to a file. read.table() and friends can read incrementally from the connection • read 1000 records • process them • lather, rinse, repeat Examples: summaryRprof(), read.fwf() Chunk size should be small enough not to cause disk thrashing, large enough that the fixed costs of ...
... file() opens a connection to a file. read.table() and friends can read incrementally from the connection • read 1000 records • process them • lather, rinse, repeat Examples: summaryRprof(), read.fwf() Chunk size should be small enough not to cause disk thrashing, large enough that the fixed costs of ...
normalization - SJSU Engineering
... Spaces are not allowed in entity names in a physical schema because these names must translate into SQL calls to create the tables. Table names should therefore conform to SQL naming rules. Because primary key attributes are complete inventions, they can be of any indexible data type. (Each database ...
... Spaces are not allowed in entity names in a physical schema because these names must translate into SQL calls to create the tables. Table names should therefore conform to SQL naming rules. Because primary key attributes are complete inventions, they can be of any indexible data type. (Each database ...
