Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Concept explainers
Question
Chapter 3, Problem 3.31RQ
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). Syntax to view the contents using asterisk (*) is as follows:
SELECT * FROM table_Name;
Aggregate Functions:
SQL has some built-in functions and they are called as aggregate functions. SQL contains five built-in functions. They are:
- SUM – This function is used to add values from the particular column.
- Syntax: SELECT SUM(column_Name) FROM table_Name;
- COUNT – This is used to count the number of rows for the particular column.
- Syntax: SELECT COUNT(column_Name) FROM table_Name;
- MAX – This function is used to get the maximum value from the column.
- Syntax: SELECT MAX(column_Name) FROM table_Name;
- MIN – This function is used to get the minimum value from the column.
- Syntax: SELECT MIN(column_Name) FROM table_Name;
- AVG – This function is used to get the average of all the values from the column.
- Syntax: SELECT AVG(column_Name) FROM table_Name;
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Database Concepts (7th Edition)
Ch. 3 - Prob. 3.1RQCh. 3 - What is a data sublanguage?Ch. 3 - Prob. 3.3RQCh. 3 - Prob. 3.4RQCh. 3 - Prob. 3.5RQCh. 3 - Why do some standard SQL-92 statements fail to run...Ch. 3 - Use the following tables for your answers to...Ch. 3 - Write an SQL CREATE TABLE statement to create the...Ch. 3 - Prob. 3.9RQCh. 3 - Prob. 3.10RQ
Ch. 3 - Prob. 3.11RQCh. 3 - Is PET or PET_2 a better design? Explain your...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - Prob. 3.15RQCh. 3 - Prob. 3.16RQCh. 3 - Prob. 3.17RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Prob. 3.19RQCh. 3 - Prob. 3.20RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Write an SQL statement to display the name, breed,...Ch. 3 - Prob. 3.23RQCh. 3 - Prob. 3.24RQCh. 3 - Prob. 3.25RQCh. 3 - Write an SQL statement to display the name and...Ch. 3 - Prob. 3.27RQCh. 3 - Write an SQL statement to count the number of...Ch. 3 - Write an SQL statement to count the number of...Ch. 3 - Prob. 3.30RQCh. 3 - Prob. 3.31RQCh. 3 - Prob. 3.32RQCh. 3 - Prob. 3.33RQCh. 3 - Answer question 3.33, but do not consider any pet...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write SQL statements to (1) create the BREED...Ch. 3 - Prob. 3.38RQCh. 3 - Prob. 3.39RQCh. 3 - Prob. 3.40RQCh. 3 - Write an SQL statement to display the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Prob. 3.44RQCh. 3 - Explain what will happen if you leave the WHERE...Ch. 3 - Prob. 3.46RQCh. 3 - Prob. 3.47RQCh. 3 - Prob. 3.48RQ
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