Answer Structured data is defined as a data that are record and being filed in the database to make it can be used efficiently. frequent the case with the selection of the type of detailed data structures should be used to allow efficient algorithms can be used. Good design data structure allows a variety of critical operations carried out by using the time and little memory space, as possible. structured data will be represent in discrete form which is in column and row form. this can make the data in the database more organized.
The DBMS will protect the structure of the data structure. Another function of the DBMS is the concurrency control services. Database Management System must ensure that the database is updated correctly because the database can be used by many multiple users. The DMS enable many user to access the data concurrently. The database managements system will help from ay data loss.
b. Data Manipulation Language . c. Data Control Language . Data Definition Language (DDL): This component is used to CREATE and ALTER (or) modify the tables and the objects of that database. CREATE TABLE 'TABLENAME' , DROP TABLE 'TABLENAME' and ALTER TABLE ... ... middle of paper ... ...tandards and the role they play in business By following SQL standards there is greater role of compatibility between similar kind of databases.
The former is known as core package while the latter is known as extension package. The JDBC material collected in the first iteration is used in this iteration. The topics to be learnt in this iteration include database concepts, creating a database, SQL, JDBC API such as Connection interface, DriverManager class, Statement interface, PreparedStatement interface and ResultSet interface. These topics are required to build applications that can connect and interact with relational databases. More applications in the real world need the knowledge of JDBC.
4.In our relational database you will be able to store information according to their unique key. This will allow the process to store the history of the equipment in a relational table. Access or SQL server systems will manage, organize and allow you to view the history distribution of the specific equipment in a relational database.
Chapter I Define each of the following terms in your own word a) Database b) DBMS c) Metadata a) Database (Crucial Concept): A database is essentially a means of storage and retrieval of items of data. The data is usually either numerical or textual, although other data forms can be accommodated. A database is a collection of data held logically and with a purpose. Is designed and organized in such manner that it can be accessed later on for different purposes. For example we need to access our Database to update some information from it or just to extract it.
The factor that makes CodeIgniter completely different over many such similar tools is rich set of libraries that deliver the wonderful assortment of code events and choices. PHP frameworks: PHP functions on the Model View Controller (MVC) fundamentals. MVC is an architectural pattern whose concepts are used in various popular programming languages that distinguishes the domain logic and the user interface. The domain logic can be elaborated as the entity that handles processed data interchange among database and user interface. The following figure clearly illustrates the flow of a MVC: Fig11: MVC function.
The OODBMS is the product of merging object oriented programming ethics with database management ethics. Object oriented programming concepts such as encapsulation, polymorphism and inheritance are imposed as well as database management concepts such as the ACID properties (Atomicity, Consistency, Isolation and Durability) which show the way for system reliability, it also supports an ad hoc query language and secondary storage management systems, which is allocated for managing very large amounts of data. The Object Oriented Database program specially lists the following features as compulsory for a system to support before it can be called an OODBMS; Composite objects, Object uniqueness, Encapsulation, Types and Classes, Class or Type Hierarchies, Overriding, overloading and late binding, Computational fullness, Extensibility, Perseverance, Secondary storage management, Concurrency, Recuperation and an Ad Hoc Query capacity. Now from the above mentioned description, an OODBMS should be able to store objects that are nearly impossible to differentiate from the kind of objects supported by the board programming language with as little limitation as feasible. Persistent objects should belong to a class and can have one or more infinitesimal types or other objects as attributes.
The primary principle was that access control models for databases should be expressed in terms of the logical data model; thus authorizations for a relational database should be expressed in terms of relations i.e. in tabular form, relation attributes, and tuples. The next principle is that for databases, in addition to name-based access control, where the protected objects are specified by specifying their names, content-based access control has to be supported. Content based access control permits the system to decide whether to provide or deny access to a data item based on the contents of the data item. The development of content based access control models, which are, in general, based on the requirement of conditions against data contents, was made easy in relational databases by the availability of declarative query languages, such as SQL.
Difference between DBMS and IRS by focusing on their functionalities. A Database Management System (DBMS) is a software system that uses a standard way of classifying, retrieving, and running queries on data. The DBMS functions is to manage any incoming data, organize it, and provide ways for the data to be modified or extracted by users or other programs. Some examples of DBMS are PostgreSQL, Microsoft Access, SQL Server, FileMaker, Oracle,Clipper and FoxPro. Since there are so many database management systems are available, so it is important to ensure that they communicate with each other.