How many bytes are there in mysql in linux?

The number of bytes occupied by mysql fields in Linux depends on factors such as field type, field length and character set encoding used. Common ones are: 1. CHAR, occupying 0 to 255 bytes; 2. VARCHAR, Occupies 0 to 65535 bytes; 3. TEXT, occupies 0 to 65535 bytes; 4. INT, occupies 4 bytes; 5. BIGINT, occupies 8 bytes; 6. FLOAT, occupies 4 bytes; 7. DOUBLE, occupies 8 bytes.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, MySQL's field types can occupy different numbers of bytes, depending on the field type and configuration. The following are some common field types in MySQL and the number of bytes they occupy:

• CHAR: fixed-length string, occupying 0 to 255 bytes, depending on the length of the field definition .

• VARCHAR: Variable length string, occupying 0 to 65535 bytes, depending on the actual content length stored in the field.

• TEXT: Variable-length text type, occupying 0 to 65535 bytes, usually used to store longer text data.

• INT: Integer type, occupies 4 bytes, used to store integer values.

• BIGINT: Long integer type, occupies 8 bytes, used to store large integer values.

• FLOAT: Single-precision floating-point number type, occupying 4 bytes, used to store decimal values.

• DOUBLE: Double-precision floating-point number type, occupying 8 bytes, used to store a larger range of decimal values.

In addition to the above field types, MySQL has other field types that may occupy different numbers of bytes. In addition, the impact of character set and encoding on storage needs to be considered. For example, when stored using the UTF-8 character set, some Unicode characters may occupy multiple bytes.

To summarize, the number of bytes occupied by a field in MySQL depends on factors such as field type, field length, and the character set encoding used. The above are the number of bytes for some common field types, but the specific situation needs to be determined based on the actual table definition and configuration.

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