Data Literal Evaluation

This section describes how data literals will be evaluated into values of particular datatypes based on the expression context.

Data literal evaluation is the process converting a data literal to a particular value of a particular data type. This data type must match the type of the expression where the literal is located. Expressions will be reviewed in the next chapter. Now let's look at some of the data literal evaluation rules for each type of data literals.

1. Character String Literals can be evaluated character strings, exact numbers, approximate numbers and data and time values. The evaluation rules are:

2. Hex String Literals can be evaluated to character strings and exact numbers. The evaluation rules are:

3. Numeric Literals can be evaluated to exact numbers and approximate numbers. The evaluation rules are:

Last update: 2015.

Table of Contents

 About This Book

 Introduction of SQL

 MySQL Introduction and Installation

 Introduction of MySQL Programs

 Perl Programs and MySQL Servers

 PHP Programs and MySQL Servers

 Java Programs and MySQL Servers

Datatypes and Data Literals

 Introduction of Datatype

 Data Binary Representations

 Data Literals

Data Literal Evaluation

 Character String Literal Evaluation Examples

 Hex String Literal Evaluation Examples

 Numeric Literal Evaluation Examples

 Operations and Expressions

 Character Strings and Bit Strings

 Commonly Used Functions

 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

 Transaction Management and Isolation Levels

 Locks Used in MySQL

 Defining and Calling Stored Procedures

 Variables, Loops and Cursors Used in Stored Procedures

 Outdated Tutorials

 References

 PDF Printing Version