ITS232 - Universiti Teknologi MARA
... Secondary key = key(s) is/are used strictly for data retrieval purposes Instead of using STU_NUM to identify student, we might use STU_LNAME, STU_FNAME, STU_INIT to identify student as well The result not necessarily is a single result In real world, I can search your academic record using name, fac ...
... Secondary key = key(s) is/are used strictly for data retrieval purposes Instead of using STU_NUM to identify student, we might use STU_LNAME, STU_FNAME, STU_INIT to identify student as well The result not necessarily is a single result In real world, I can search your academic record using name, fac ...
SQL – the natural language for analysis
... is not equal to ‘CLERK’. Using the OR operator, only one of the conditions needs to return a true such that our query would return all the rows where the salary is between 10,000 and 25,000 or the job is not equal to ‘CLERK’. This means that clerks earning between 10,000 and 25,000 will be included ...
... is not equal to ‘CLERK’. Using the OR operator, only one of the conditions needs to return a true such that our query would return all the rows where the salary is between 10,000 and 25,000 or the job is not equal to ‘CLERK’. This means that clerks earning between 10,000 and 25,000 will be included ...
Folie 1
... • by a conceptual data model • it obtains the data entities and their relationships within a scope of a system • the entities have properties (attributes) • it is independend of the storing in a database and other technical requierements • it can be designed in different forms (relational, network, ...
... • by a conceptual data model • it obtains the data entities and their relationships within a scope of a system • the entities have properties (attributes) • it is independend of the storing in a database and other technical requierements • it can be designed in different forms (relational, network, ...
Triggers
... 2. Disable temporarily all integrity constraints recorded against the table 3. Loop for each row in the table Execute all BEFORE ROW triggers Execute the SQL statement against the row and perform integrity constraint checking of the data Execute all AFTER ROW triggers ...
... 2. Disable temporarily all integrity constraints recorded against the table 3. Loop for each row in the table Execute all BEFORE ROW triggers Execute the SQL statement against the row and perform integrity constraint checking of the data Execute all AFTER ROW triggers ...
CS 245: Database System Principles
... – Data type differences: Serial numbers might be represented by character strings or integers – Value differences: The color black might be represented by an integer code, the string BLACK, or the code BL – Semantic differences: One dealer distinguish station wagon from minivans, while another doesn ...
... – Data type differences: Serial numbers might be represented by character strings or integers – Value differences: The color black might be represented by an integer code, the string BLACK, or the code BL – Semantic differences: One dealer distinguish station wagon from minivans, while another doesn ...
Unit 2 Database Development
... provided by CASE tools include: data dictionary to store information about database system’s data; design tools to support data analysis; tools to permit development of corporate data model, and conceptual and logical data ...
... provided by CASE tools include: data dictionary to store information about database system’s data; design tools to support data analysis; tools to permit development of corporate data model, and conceptual and logical data ...
DATA STREAMS AND DATABASES
... If all tuples affected by revision are still in memory: Recompute affected results incrementally, using old and new versions of dataset for the affected timestamp(s) ¤ Only output new records that actually changed ¤ (Revised outputs may force other revisions to be made…) ...
... If all tuples affected by revision are still in memory: Recompute affected results incrementally, using old and new versions of dataset for the affected timestamp(s) ¤ Only output new records that actually changed ¤ (Revised outputs may force other revisions to be made…) ...
Natix - Al Akhawayn University
... Map data to relational database But: Store data as a plain text file Unnormalized relations But: Data as centric view: Large number Storedata objects Need to parse the entire file for of tables But: processing every query Designing Nativecentric XML database Document all OOD sy ...
... Map data to relational database But: Store data as a plain text file Unnormalized relations But: Data as centric view: Large number Storedata objects Need to parse the entire file for of tables But: processing every query Designing Nativecentric XML database Document all OOD sy ...
Query Processing - Department of Computer Science
... with A. Furthermore, the need for T to set a lock on A prevents T from accessing A if some other transaction is already using A. T must wait until the other transaction unlocks A, which it should do only after finishing with A. ...
... with A. Furthermore, the need for T to set a lock on A prevents T from accessing A if some other transaction is already using A. T must wait until the other transaction unlocks A, which it should do only after finishing with A. ...
XML and Databases
... • Attributes are specified by name=value pairs inside the starting tag of an element • An element may have several attributes, but each attribute name can only occur once
...
... • Attributes are specified by name=value pairs inside the starting tag of an element • An element may have several attributes, but each attribute name can only occur once
Chapter 9- security
... Application Roles This is a special role that must be activated using a password It is designed to force users to use a specific application to access data The activation code can be hardwired into your custom applications It does not contain any users ...
... Application Roles This is a special role that must be activated using a password It is designed to force users to use a specific application to access data The activation code can be hardwired into your custom applications It does not contain any users ...
CS 340 Lab Manual - CS 340 Database Management System
... SQL statements entered at the SQL*Plus prompt are held in a multi-line command buffer. Non-SQL statements (such as help) may be entered without changing the contents of the SQL buffer. The buffer retains the contents of the latest SQL statement until a new SQL statement is entered or the buffer is c ...
... SQL statements entered at the SQL*Plus prompt are held in a multi-line command buffer. Non-SQL statements (such as help) may be entered without changing the contents of the SQL buffer. The buffer retains the contents of the latest SQL statement until a new SQL statement is entered or the buffer is c ...
Clinical Data Management Using SAS/AF
... STATPROBE, Inc. developed an integrated data management system, using SAs/AF as the platform. The system incorporates security and tools that aSSist the valid production and analysis of the clinical data. Various modules in the system support numerous clinical data management activities. Data at the ...
... STATPROBE, Inc. developed an integrated data management system, using SAs/AF as the platform. The system incorporates security and tools that aSSist the valid production and analysis of the clinical data. Various modules in the system support numerous clinical data management activities. Data at the ...
Slide Template
... Allow data providers to expose pieces of DBMS functionality Providers can deliver functionality in multiple interfaces Interfaces are standardized and extensible ...
... Allow data providers to expose pieces of DBMS functionality Providers can deliver functionality in multiple interfaces Interfaces are standardized and extensible ...
Evolution Of Data Modeling for Databases
... query language ( S Q L ) - - a n emerging standard, to define the schema. T h e entire activity o f starting from requirements and p r o d u c i n g the definition o f the final implementable schema in a DBMS is called schema design. T h e DMBS is used to store a database conforming to that schema; ...
... query language ( S Q L ) - - a n emerging standard, to define the schema. T h e entire activity o f starting from requirements and p r o d u c i n g the definition o f the final implementable schema in a DBMS is called schema design. T h e DMBS is used to store a database conforming to that schema; ...
sv-lncs - HAL
... integrate support for all kinds of data (e.g., multimedia objects, XML documents and new functions), this has resulted in a loss of performance and flexibility for applications with specific requirements because they provide both “too much” and “too little”. Therefore, it has been argued that more s ...
... integrate support for all kinds of data (e.g., multimedia objects, XML documents and new functions), this has resulted in a loss of performance and flexibility for applications with specific requirements because they provide both “too much” and “too little”. Therefore, it has been argued that more s ...
Introduction to Databases - Department of Software and Information
... compared with rolling 12-monthly prior figures? What would be the effect on property sales in the different regions of Britain if legal costs went up by 3.5% and Government taxes went down by 1.5% for properties over £100,000? Which type of property sells for prices above the average selling price f ...
... compared with rolling 12-monthly prior figures? What would be the effect on property sales in the different regions of Britain if legal costs went up by 3.5% and Government taxes went down by 1.5% for properties over £100,000? Which type of property sells for prices above the average selling price f ...
Using Proc SQL and ODBC to Manage Data outside of SAS®
... particular database using a proprietary language. If you want to access MS-Access, SQL Server or an Oracle database you would need to know and understand three different flavors of SQL with an ODBC in place, you can access the data in these different databases from SAS and use both SQL statements an ...
... particular database using a proprietary language. If you want to access MS-Access, SQL Server or an Oracle database you would need to know and understand three different flavors of SQL with an ODBC in place, you can access the data in these different databases from SAS and use both SQL statements an ...
