What does desc mean in mysql?

MySQL's DESC command displays structural information about a table or view, including column names, data types, keys, default values, and nullability.

DESC in MySQL

DESC is a command in MySQL that is used to display tables or views in the database structural information.

Function

The DESC command provides detailed information about the table structure, including:

• Column name
• Data type
• Key constraints (primary key, foreign key, unique index)
• Default value
• Nullability (NULL allowed)

Usage

The basic syntax of the DESC command is:

<code>DESC [数据库名.]表名;</code>

For example, to view the structure of a table named "my_table", use:

<code>DESC my_table;</code>

Output

The output of the DESC command is a table containing the following column information:

##idintPRINULLNonamevarchar(255)UNI NULL is ageint0Yes

Column Name	Data Type	Key	Default value	can be empty

Note

The DESC command can also be used with views, but it only displays the definition of the view , without showing the structure of the underlying table.
• The DESC command does not accept any options or parameters.

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