ing and Refining Authorization in SQL Arnon Rosenthal, Edward Sciore1 Abstract. The SQL standard specifies authorization via a large set of rather opaque rules, which are difficult to understand and dangerous to change. To make the model easier to work with, we formalize the implicit principles behind The SQL standard specifies authorization via a large set of rather opaque rules, which are dif...

Relational Algebra (RA) and structured query language (SQL) are supposed to have a bijective relationship by having the same expressive power. That is, each operation in SQL can be mapped to one RA equivalent and vice versa. Actually, this is an essential fact because in commercial database management systems, every SQL query is translated into equivalent RA expression, which is optimized and e...

SQL injection is a technique that exploits a security vulnerability occurring in the database layer of an application. The attack takes advantage of poor input validation in code and website administration. It allows attackers to obtain unauthorized access to the back-and database to change the intended application generated SQL queries. Researchers have proposed various solutions to address SQ...

Information p lays an important role in our everyday life and databases are widely used for storing and retrieving informat ion. Database technology is having major impact in the world of computing. To access the informat ion from database one need to have knowledge of database query language such as SQL. Because the naïve user may not be aware of the syntax of SQL and structure of database, s/...

SQL injection is an attack of type to insert malicious query via an input form on web site. If SQL injection attack were successful, there are the threats of unauthorized access, information leak or falsification of data for web applications driven database system. In the conventional studies, a lot of prevention and detection methods using pattern matching, parsing or machine learning have bee...

Searching learning or rules in relational database for data mining purposes with characteristic or classification/discriminant rule in attribute oriented induction technique can be quicker, easy, and simple with simple SQL statement. With just only one simple SQL statement, characteristic and classification rule can be created simultaneously. Collaboration SQL statement with any other applicati...

A wide range of database applications manage time-varying data, and it is wellknown that querying and correctly updating time-varying data is difficult and error-prone when using standard SQL. Temporal extensions of SQL offer substantial benefits over SQL when managing time-varying data. The topic of this paper is the effective implementation of temporally extended SQL’s. Traditionally, it has ...

SQL Injection Attack (SQLIA) is a technique that helps the attackers to direct enters into the database in an unauthorized way and reach the highest or most decisive point in extracting or updating sensitive information from any organizations database. In this paper, we studied the scenario of the different types of attacks with descriptions and examples of how attacks of that type could be per...

In the world of computing, information plays an important role in our lives. One of the major sources of information is database. Database and Database technology are having major impact on the growing use of computers. Almost all IT applications are storing and retrieving the information or data from the database. Database Management Systems (DBMS) have been widely used for storing and retriev...