問題:
I really want to know more about the update, export and the values that could be given to hibernate.hbm2ddl.auto
我真的很想知道更多關於更新、導出和可以給hibernate.hbm2ddl.auto
的值
I need to know when to use the update and when not?我需要知道何時使用更新,何時不使用? And what is the alternative?什麼是替代方案?
These are changes that could happen over DB:這些是可能發生在 DB 上的更改:
- new tables新表
- new columns in old tables舊錶中的新列
- columns deleted列已刪除
- data type of a column changed列的數據類型已更改
- a type of a column changed its attributes一種類型的列改變了它的屬性
- tables dropped桌子掉了
- values of a column changed列的值已更改
In each case what is the best solution?在每種情況下,最佳解決方案是什麼?
解決方案:
參考一: https://en.stackoom.com/question/1pys參考二: https://stackoom.com/question/1pys