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In this article, the editor introduces in detail "how to use defaul in mysql". The content is detailed, the steps are clear, and the details are handled properly. I hope that this article "how to use defaul in mysql" can help you solve your doubts.

1. It is used to set the default value of the column. If no value is assigned to a field, the system automatically inserts the default value for the field.

No assignment means that when insert inserts data, the field is not specified.

2. If a null value is specified, the final stored value is null.

Example

Mysql > create table user (age int (11) default 18); Query OK, 0 rows affected, 1 warning (0.05 sec) mysql > insert user values (); Query OK, 1 row affected (0.02 sec) mysql > select * from user +-+ | age | +-+ | 18 | +-+ 1 row in set (0.00 sec). This article "how to use defaul in mysql" has been introduced. If you want to master the knowledge of this article, you need to practice and use it before you can understand it. If you want to know more about related articles, please follow the industry information channel.

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