What does gbk mean in mysql?

In MySQL, GBK encoding is used to store Simplified Chinese data, using double-byte character set (DBCS), supporting 65536 characters, including Chinese characters, ASCII characters, and special symbols.

The meaning of GBK encoding in MySQL

GBK (that is, Guó BiaoKuóji (National Standard Extension Library) is a character encoding standard widely used in Simplified Chinese environments. In the MySQL database, the GBK character set is used to store and process fields containing Simplified Chinese data.

GBK encoding is based on DBCS (double-byte character set), which uses two bytes to represent a character. GBK supports 65536 different characters, including all Chinese characters, ASCII characters and some special symbols.

Advantages of GBK character set

• Extensive Chinese support: GBK encoding covers the vast majority of simplified Chinese characters, so it can Store and process Chinese data efficiently.
• Good compatibility: The GBK character set is widely used in the Chinese environment, so it has good compatibility with other systems and applications.
• Fixed byte length: The GBK character set uses double bytes to represent each character, so the byte length of the field can be easily determined.

Disadvantages of GBK character set

• Does not support UTF-8:GBK character set does not support multi-byte encoding Standard UTF-8, so you may encounter compatibility issues when dealing with multilingual data.
• Low space efficiency: Due to the use of double-byte encoding, the GBK character set has low space efficiency when storing Chinese data and takes up more storage space than UTF-8.
• Compatibility issues: The GBK character set is not an international standard, so there may be compatibility issues in non-Chinese environments.

Notes on selecting the GBK character set

When selecting the GBK character set, you need to consider the following factors:

• Locale of the application: If the application mainly handles Simplified Chinese data, the GBK character set is a good choice.
• Compatibility requirements: If an application needs to interact with other systems or applications, it needs to consider whether their character sets are compatible with GBK.
• Storage Space Limitations: If storage space is limited, you should consider using the UTF-8 character set as it has better space efficiency.

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