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Table of Contents

10.1. Character Sets and Collations in General
10.2. Character Sets and Collations in MySQL
10.3. Specifying Character Sets and Collations
10.3.1. Server Character Set and Collation
10.3.2. Database Character Set and Collation
10.3.3. Table Character Set and Collation
10.3.4. Column Character Set and Collation
10.3.5. Character String Literal Character Set and Collation
10.3.6. National Character Set
10.3.7. Examples of Character Set and Collation Assignment
10.3.8. Compatibility with Other DBMSs
10.4. Connection Character Sets and Collations
10.5. Collation Issues
10.5.1. Using COLLATE in SQL Statements
10.5.2. COLLATE Clause Precedence
10.5.3. BINARY Operator
10.5.4. Some Special Cases Where the Collation Determination Is Tricky
10.5.5. Collations Must Be for the Right Character Set
10.5.6. An Example of the Effect of Collation
10.6. Operations Affected by Character Set Support
10.6.1. Result Strings
10.6.2. CONVERT() and CAST()
10.6.3. SHOW Statements and INFORMATION_SCHEMA
10.7. Unicode Support
10.8. UTF-8 for Metadata
10.9. Character Sets and Collations That MySQL Supports
10.9.1. Unicode Character Sets
10.9.2. West European Character Sets
10.9.3. Central European Character Sets
10.9.4. South European and Middle East Character Sets
10.9.5. Baltic Character Sets
10.9.6. Cyrillic Character Sets
10.9.7. Asian Character Sets

MySQL includes character set support that enables you to store data using a variety of character sets and perform comparisons according to a variety of collations. You can specify character sets at the server, database, table, and column level. MySQL supports the use of character sets for the MyISAM, MEMORY, NDBCluster, and InnoDB storage engines.

This chapter discusses the following topics:

  • What are character sets and collations?

  • The multiple-level default system for character set assignment

  • Syntax for specifying character sets and collations

  • Affected functions and operations

  • Unicode support

  • The character sets and collations that are available, with notes

Character set issues affect data storage, but also communication between client programs and the MySQL server. If you want the client program to communicate with the server using a character set different from the default, you'll need to indicate which one. For example, to use the utf8 Unicode character set, issue this statement after connecting to the server:

SET NAMES 'utf8';

For more information about character set-related issues in client/server communication, see Section 10.4, “Connection Character Sets and Collations”.

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