MySQL Tutorials - Herong's Tutorial Examples - v4.46, by Herong Yang
SQL and Database Terminologies
This section provides brief descriptions of terminologies related to SQl and database.
Attribute - A kind of information that describes one aspect of a data object. For example, "age" is an attribute of a person, and "salary" is an attribute of an employee. "Attribute" is also called "column".
ASCII - American Standard Code for Information Interchange. An encoding algorithm that uses 128 7-bit codes to represent English alphabetics, some symbols and printing control commands.
DDL (Data Definition Language) - A set of SQL statements that manage data structures in the database. Examples of DDL are CREATE, ALTER, DROP, etc.
DML (Data Manipulation Language) - A set of SQL statements that manages data instances in the database. Examples of DML are INSERT, UPDATE, DELETE, etc.
JOIN - A type of table operations that join rows from two tables based on matching conditions.
RDBMS - Relational Database Management System.
Relation - A data object defined by a set of attributes. For example, "employee" is a relation with various attributes that define the employee data object. "Relation" is also called "table".
Tuple - An instance of a data object with specific values for all attributes of the relation. For example, one tuple of the "course" relation is the operating system course with "operating system" as the value of the "course name" attribute, and other values for other attributes. "Tuple" is also called "row" or "record".
UTF8 - Unicode Transformation Format 8-bit. An encoding algorithm that encodes each Unicode character into a sequence of bytes (8-bit binary codes) with the first bit set to 0. UTF8 is compatible with ASCII encoding and safe for electronic communications. In MySQL, UTF8 is alias of UTF8MB3, which only supports Unicode characters in the range of U+000800 and U+00FFFF.
UTF8MB3 - Unicode Transformation Format 8-bit - Multiple-Byte 3. An subset of UTF8 that uses up to 3 bytes to supports Unicode characters in the range of U+000000 and U+00FFFF.
UTF8MB4 - Unicode Transformation Format 8-bit - Multiple-Byte 4. The full version of UTF8 that uses up to 4 bytes to supports Unicode characters in the range of U+000000 and U+10FFFF.
Table of Contents
►SQL and Database Terminologies
MySQL Introduction and Installation
Introduction of MySQL Programs
Perl Programs and MySQL Servers
Java Programs and MySQL Servers
Character Strings and Bit Strings
Table Column Types for Different Types of Values
Using DDL to Create Tables and Indexes
Using DML to Insert, Update and Delete Records
Using SELECT to Query Database
Window Functions for Statistical Analysis
Use Index for Better Performance
Transaction Management and Isolation Levels
Defining and Calling Stored Procedures
Variables, Loops and Cursors Used in Stored Procedures
System, User-Defined and Stored Procedure Variables
Storage Engines in MySQL Server
InnoDB Storage Engine - Primary and Secondary Indexes
Performance Tuning and Optimization
Installing MySQL Server on Linux