How do I customize MySQL autoincrement format to display zero-filled digits?

Customizing MySQL Autoincrement Format to Zero-Filled Digits

Autoincrement functionality in MySQL assigns unique sequentially increasing values to new records inserted into a table. By default, autoincrement values are displayed without leading zeros. However, there may be scenarios where you need the autoincrement format to be in a specific format, such as four-digit zero-filled numbers.

To achieve this, you can utilize the ZEROFILL attribute when creating the autoincrement column. Here's how:

<code class="sql">ALTER TABLE table_name
MODIFY column_name INT NOT NULL AUTO_INCREMENT ZEROFILL;</code>

By adding the ZEROFILL attribute to the column definition, MySQL will automatically prepend leading zeros to the autoincrement values to match the specified format. For example, instead of displaying '1,' the autoincrement value will become '0001.'

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