Shulou(Shulou.com)06/01 Report--

The following together to understand how to modify MySQL field type, I believe we will certainly benefit a lot after reading, the text is not more refined, I hope how to modify MySQL field type This short content is what you want.

In MySQL, an alter table statement is used to add, modify, or delete columns (fields) in an existing table.

1. Add fields (columns)

alter table table name add field name data type

Example: Add a new column named Birthday to the table Persons with data type date

alter table Persons add Birthday date

Description: The new column "Birthday" type is date, you can store the date

2. Modify the field name

alter table rename column A to B

3. Modify the field type

alter table table name alter column field name data type

Example: Change the data type of the Birthday column in the table Persons to year

alter table Persons alter column Birthday year

Note: The data type of the "Birthday" column is year, which can store the year in 2-digit or 4-digit format.

4. Delete fields

alter table name drop column field name

Example: Deleting the Birthday column in the Person table

alter table Persons drop column Birthday

After reading this article on how to modify MySQL field types, many readers will definitely want to know more about related content. For more industry information, you can pay attention to our industry information column.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.