Whichever UTECH person this is, Stop Being lazy and go research the questions.
Tables are the basic building blocks of a relational database.
Relation is one record in the database or a tuple. Relationship is that how tables are connected to each other.
As I understand it, a database schema is a physical entity, it describes the structure of exactly how the data is stored and is itself stored by DBMS for reference. Data model, on the other hand, is an abstract representation of database.
They just are
You dont
functions of DBA in DBMS
Functions of a typical database management system?
Database Functions can and so can Statistical Functions. It depends on what it is you want to do.
Functions of a Database Management System: - Database Definition - Database creation (storing data in a defined database) - Retrieval (query and reporting) - Update(Changing the contents of the database) - Programming User Facilities for system development) - Database revision and restructuring - Database integrity control - Performance Monitoring
create the database
database
Declarative query languages allow users to specify what data they want without specifying how to retrieve it. This abstraction simplifies the querying process and allows for optimization by the database system to determine the most efficient way to execute the query. It also enhances portability and adaptability by separating the query logic from the database structure.
Simple answer, because that is what the database is supposed to do, it is built for it and efficient at it. Extracting data, creating database overhead, much larger data set than what is needed, the resulting network traffic; all not a logical approach. The best approach is to call a procedure within SQL (Which is compiled) with parameters and allow SQL server to parse, and access the data in the most efficient manner, returning only the data that is required.
They are organised into categories. Those categories are: Database functions Date and time functions Engineering functions Financial functions Information functions Logical functions Lookup and reference functions Math and trigonometry functions Statistical functions Text functions External functions Cube functions
Are really important in an Oracle Database.
database
discuss database and field functions