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;

Question

Want to see the full answer?

Answer 1

Question

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;

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

(c) Consider the following set of processes: Process ID Arrival Time Priority Burst Time A 2 3 100 B 6 C 10 1 (highest) 2 40 80 D 16 4 (lowest) 20

(3e) Test-and-Set. The Test-and-Set instruction is used in hardware to achieve synchronization. It can be defined in the following way: function Test-and-Set (var target: boolean): boolean; begin Test-and-Set:= target; target := true; end; Now show how the Test-and-Set instruction can be used to protect a critical region and hence achieve mutual exclusion (do not worry about satisfying the bounded waiting condition). (8 points) repeat

Consider a system with three smoker processes and one agent process. Each smoker continuously rolls a cigarette and then smokes it. But to roll and smoke a cigarette, the smoker needs three ingredients: tobacco, paper and matches. One of the smoker processes has paper, another has tobacco and the third has the matches. The agent has an infinite supply of all three materials. The agent places two of the ingredients on the table. The smoker who has the remaining ingredient then makes and smokes a cigarette, signaling the agent on completion. The agent then puts out another two of the three ingredients, and the cycle repeats. Given below is a solution to the Cigarette-Smokers Problem. Give initial conditions for the semaphores as well as plausible values for the variables i & j and r & s, such that the agent and smokers are synchronized. Write a couple of sentences on why these initial conditions are necessary and sufficient. Solution: var a: array [0..2] of semaphore (initial condition =…