SQL Tutorial |[pic] | SQL is a standard computer language for accessing and manipulating databases. | | |In this tutorial you will learn how to use SQL to access and manipulate data in Oracle‚ Sybase‚ SQL | | |Server‚ DB2‚ Access‚ and other database systems. | Introduction to SQL [pic] SQL is a standard computer language
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computers to huge systems that run on mainframes. SQL SQL (Structured Query Language) is a special-purpose programming language designed for managing data held in a relational database management system (RDBMS)‚ or for stream processing in a relational data stream management system (RDSMS). Originally based upon relational algebra and tuple relational calculus‚ SQL consists of a data definition language and a data manipulation language. The scope of SQL includes data insert‚ query‚ update and delete
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1327 IEEE TRANSACTIONS ON COMMUNICATIONS‚ VOL. 60‚ NO. 5‚ MAY 2012 Random4: An Application Specific Randomized Encryption Algorithm to prevent SQL injection Avireddy‚ S. Dept. of Inf. Technol.‚ Anna Univ.‚ Chennai‚ India Perumal‚ V. ; Gowraj‚ N. ; Kannan‚ R.S. ; Thinakaran‚ P. ; Ganapthi‚ S. ; Gunasekaran‚ J.R. ; Prabhu‚ S. Abstract—Web Applications form an integral part of our day to day life. The number of attacks on websites and the compromise of many individuals secure data are
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NTSB Investigating Southwest Airlines Flight 345 accident at LaGuardia Airport The National Transportation Safety Board is investigating the July 22‚ 2013 nose-down landing of a Southwest Airlines Boeing 737-700 at LaGuardia Airport in New York. The accident occurred at 5:45 p.m. after the twin-engine jet’s nose landing gear collapsed rearward and upward into the fuselage‚ damaging the electronics bay‚ which houses avionics and other equipment. The exterior of the airplane was also damaged from
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reference: http://www.tutorialspoint.com/sql important: constrains: SQL constraints are used to specify rules for the data in a table. If there is any violation between the constraint and the data action‚ the action is aborted by the constraint. In SQL‚ we have the following constraints: NOT NULL - Indicates that a column cannot store NULL value UNIQUE - Ensures that each rows for a column must have a unique value PRIMARY KEY - A combination of a NOT NULL and UNIQUE. Ensures that
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Lecture-13 Structured Query Language (SQL) Introduction Commercial database systems use more user friendly language to specify the queries. SQL is the most influential commercially marketed product language. Other commercially used languages are QBE‚ Quel‚ and Datalog. Basic Structure The basic structure of an SQL consists of three clauses: select‚ from and where. select: it corresponds to the projection operation of relational algebra. Used to list the attributes desired in the
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Database Management Systems ________________________________________ Database Management System is an umbrella term that refers to all sorts of completely different tools (i.e. computer programs or embedded libraries)‚ mostly working in different and very unique ways. These applications handle‚ or heavily assist in handling‚ dealing with collections of information. Since information (or data) itself can come in various shapes and sizes‚ dozens of DBMS have been developed‚ along with tons of DB
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Creating‚ dropping‚ and altering tables in SQLite In this part of the SQLite tutorial‚ we will cover the data definition language (DDL) of the SQLite database. The DDL consists of SQL statements that define the database schema. The schema is the database structure described in a formal language. In relational databases‚ the schema defines the tables‚ views‚ indexes‚ relationships‚ or triggers. The SQLite supports the following three DDL statements: CREATE ALTER TABLE DROP In SQLite‚ the CREATE statement
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SQL Queries I. Give a database schema for a library management system as the following picture. [pic] 1. How many copies of the book titled Database Fundamentals” are owned by the library branch whose name is "University of Delhi"? 2. How many copies of the book titled The Lost Tribe are owned by each library branch? 3. Retrieve the names of all borrowers who do not have any books checked out. 4. For each book that is loaned out from the " University of Delhi " branch
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SQL-QUERIES 1. Display all the information of the EMP table? A) select * from emp; 2. Display unique Jobs from EMP table? A) select distinct job from emp; B) select unique job from emp; 3. List the emps in the asc order of their Salaries? A) select * from emp order by sal asc; 4. List the details of the emps in asc order of the Dptnos and desc of Jobs? A)select * from emp order by deptno asc‚job desc; 5. Display all the unique job groups in the descending order? A)select distinct job from emp order
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