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List the different types of database user and explain?
4 Types of Database Users Users are differentiated by the way they expect to interact with the system: · Application programmers - interact with system through DML calls. · Sophisticated users - form requests in a database query language. · Specialized users - write specialized database applications that do not fit into the traditional data processing framework. · Naive users - invoke one of the permanent application programs that have been written previously.FROM: Database Systems Concepts 1.17 Silberschatz, Korth and Sudarshan c1997
Explain various DDl commands in SQL?
DDL (Data Definition Language) commands in SQL are used to define the structure of database objects. Some common DDL commands include: CREATE: Used to create database objects like tables, views, indexes, etc. ALTER: Used to modify the structure of existing database objects. DROP: Used to delete database objects. TRUNCATE: Used to delete all records from a table.
Explain the purpose and scope of database security?
The purpose of database is to protect unauthorized accessing of data and misuses by hackers and unauthorized personals. So here the database security comes into the picture.Database security denotes the system, processes, and procedures that protect a database from unintended activity. Security is usually enforced through access control, auditing, and encryption. * Access control ensures and restricts who can connect and what can be done to the database. * Auditing logs what action or change has been performed, when and by whom. * Encryption: Since security has become a major issue in recent years, many commercial database vendors provide built-in encryption mechanisms. Data is encoded natively into the tables and deciphered "on the fly" when a query comes in. Connections can also be secured and encrypted if required using DSA, MD5, SSL or legacy encryption standard. Enforcing security is one of the major tasks of the DBA. In the United Kingdom, legislation protecting the public from unauthorized disclosure of personal information held on databases falls under the Office of the Information Commissioner. United Kingdom based organizations holding personal data in electronic format (databases for example) are required to register with the Data Commissioner.[2]
What is an unsafe query and Give an example and explain why it is important to disallow such queries?
An unsafe query is a query that is vulnerable to SQL injection, allowing malicious users to run unauthorized commands on a database. Example: "SELECT * FROM users WHERE username = 'admin' AND password = 'password' OR 1=1;". It's crucial to disallow such queries to prevent security breaches, data manipulation, unauthorized access to information, and potential damage to the database.
What is an unsafe query Give an example and explain why it is important to disallow such queries?
A query in which the output is possibly infinite. This most often occurs in queries which are recursive or which contain negation. Such queries are disallowed by many database management systems to prevent unsafe queries.
When setting up a database table it is a good idea to use validation Explain what the purpose of validation is for?
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Discuss various errors that occur during database design. explain various database integrity issues in detail.?
i am not aware about it.if u get to know then let me know
Explain how records and related records are deleted to ensure the integrity and consistency of the database is maintained?
Do it yourself. P.S Im a BTEC National Teacher.
Explain why validation cannot stop incorrect information from being entered into a database?
Because it just checks if the wrong data has been entered in the wrong field.
Explain architecture of Distributed Database systems Also explain the reasons for building distributed database systems?
1 Explain architecture of Distributed Database systems? Also, explain the reasons for building distributed database systems?
What are the characteristics of database?
chandranana explain the characteristic of database?
What is relational database Explain the purpose of creating database?
A relational database is a type of database that stores and organizes data in tables with a predefined structure. The purpose of creating a database is to efficiently store, manage, and retrieve data for various applications or systems. Databases help to ensure data integrity, enable data sharing, provide a structured way to store information, and support data analysis and reporting.
Explain three disadvantages of centralized database and distributed database?
what are the disadvantages of centralized database system
Explain how a database makes paying for a product online possible?
explain how database makes paying for products on the internet possible?
Database Design?
form_title=Database Design form_header=Transform your company by incorporating a new database design. What program will the database be used with?=_ Please explain what you will be using the database for?="" Do you have a database that you're already using?= () Yes () No
Define the two principle integrity rules for the relational modelDisscuss why it is desirable to enforce these rules also explain how DBMS enforces these integrity rules?
Define the two principle integrity rules for the relational modelDisscuss why it is desirable to enforce these rules also explain how DBMS enforces these integrity rules?
Functions of database manager in Database management system. explain the functions with example.?
functions of DBA in DBMS
