關於「MySQL ADD column default value」標籤，搜尋引擎有相關的訊息討論：

Adding a new SQL column with a default value - Stack Overflowstackoverflow.com › questions › adding-a-new-sql-column...How to Add a Default Value to a Column in MySQL - PopSQLpopsql.com › learn-sql › how-to-add-a-default-value-to-a-...How to add a column with a default value to