A Guide to SQL
A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 6, Problem 1RQ
Program Plan Intro

SQL:

  • SQL stands for “Structured Query Language”.
  • The current version of SQL is “ANSI SQL – 92”.
  • 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.
  • It contains constructs which are used to define and process database. They are executed using DBMS-supplied command prompt.
  • Some of the DBMS products provide GUI tools in order to perform tasks are as follows:
    • SQL Server
    • Oracle Database
    • MySQL

Data Definition Language (DDL):

  • It is used for creating tables and other structures. They perform operations like, creating tables, modifying database, and removing database.

Expert Solution & Answer
Check Mark

Explanation of Solution

Table Creation:

Creating table comes under Data Definition Language (DDL).

  • The “CREATE” command is employed for establishing databases on our platform by constructing tables in an already existing database.

The Syntax for creating table is as follows:

CREATE TABLE TABLE_NAME (

  Column1 datatype,

  Column2 datatype,

  …

);

Example:

Creating table “EMP_1”:

 CREATE TABLE EMP_1 ( EMP_NUM CHAR(3) , EMP_LNAME VARCHAR(15) , EMP_FNAME VARCHAR(15) , EMP_INITIAL CHAR(1), EMP_HIREDATE DATE, JOB_CODE CHAR(3));

Explanation:

 The above query is used to create a table structure named “EMP_1” . The attribute “EMP_NUM”, “JOB_CODE”, “EMP_LNAME” and “EMP_FNAME” are declared.

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