What is the command to find table structure in mysql

To find the structure of a MySQL table, you can use the DESCRIBE command, followed by the name of the table you want to examine. The output will provide detailed information about each column in the table, including name, data type, nullability, key constraints, and default values.

MySQL command to find the table structure

To find the structure of a MySQL table, you can use the following command:

<code class="mysql">DESCRIBE table_name;</code>

where table_name is the name of the table whose structure you want to examine.

Output Description

This command returns a result set that contains the following information about each column in the table:

• Field: The name of the column
• Type: The data type of the column
• Null: Specifies whether the column allows null values
• Key: Specifies whether the column is a primary key, foreign key or unique key
• Default: The default value of the column
• Extra: Additional information, such as auto-increment columns

Example

Suppose you have a table named customers, Its structure is as follows:

<code>CREATE TABLE customers (
  id INT NOT NULL AUTO_INCREMENT,
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) UNIQUE,
  phone_number VARCHAR(20)
);</code>

Use the DESCRIBE command to query the structure of the customers table, you will get the following output:

<code>Field       Type       Null    Key     Default  Extra
id          int         NO      PRI     NULL     auto_increment
name        varchar(255)  NO      MUL     NULL     
email       varchar(255)  NO      UNI     NULL     
phone_number varchar(20)  YES     MUL     NULL     </code>

This output displays:# There are four columns in the

## table:
• id, name, email, and phone_number.
• id The column is the primary key and is automatically incremented. The
• name and email columns do not allow null values.
• email The column has a unique key constraint.
• phone_number Column allows null values.

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