Ed Engineering Section (C) Coding and Relational Algebra (Each question 1- What will be the result of the following query? Give explanation? CREATE TABLE Employee(Emp id NUMERIC NOT NULL, Name VARCHAR(2 0), dept name VARCHAR(20), Salary NUMERIC UNIQUE(Emp id.Name); INSERT INTO Employee VALUES(1002, Ross, CSE, 10000) INSERT INTO Employee VALUES(1006, Ted,Finance. ): INSERT INTO Employee VALUES(1002,Rita,Sales,20000); 2- Write an SQL query that returns for each article, its ID, title and the number of authors. 3. Write SQL statements that correspond to the following relational algebra expression. II ite year (Oyear-2005(Articles)) glish (United States)
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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