Chapter 3, Problem 3.33RQ

Program Plan Intro

SQL:

• SQL stands for “Structured Query Language”.
• The current version of SQL is “ANSI SQL – 92”.
• It contains constructs which are used to define and process database. They are executed using DBMS-supplied command prompt.
• SQL is not a programming language. It is text-based and it is also called as data sublanguage. In order to get SQL as a complete programming language, it should be included in scripting languages like Java, C#, and so on.

Display values from table:

The contents from the table can be viewed by using “SELECT” statement which comes under Data Manipulation Language (DML).

The syntax to view the contents using asterisk (*) is as follows:

SELECT * FROM table_Name;

HAVING Clause:

In SQL, “HAVING” clause in used to overcome “WHERE” clause because, “WHERE” clause cannot be used with aggregate functions. It is possible to group limited number of members by using “HAVING” clause.

Syntax:

SELECT column_Name1 FROM table_Name GROUP BY column_Name2 HAVING condition;