How to save or update data in MyBatis?

MyBatis offers various methods for saving or updating data.

1. Saving data using the insert statement:
   Define the insert statement using the tag, and then call the corresponding Mapper method in Java code to execute the insert operation. For example:
2. Insert the user’s name and age into the database.
3. Add a new user by calling the insert method of UserMapper in the sqlSession.
4. Update data using the update statement:
   Define the update statement using the tag, and then call the corresponding Mapper method in Java code to execute the update operation. For example:
5. 
   UPDATE the user’s information, specifically changing the name to #{name} and age to #{age}, where the user’s ID matches #{id}.
   
6. Update the user in the “UserMapper” using the SQL session.
7. Save or update data using the INSERT statement:
   Define the insert or update statement using the tag, and specify the condition for insert or update using the tag. For example:
8. This code snippet is for saving or updating a user in the database based on their name. It first checks if the user exists by querying their ID using their name. If the ID is null, it inserts a new user record with the specified name and age. If the ID is not null, it updates the existing user record with the new name and age.
9. Save or update the user in the UserMapper using sqlSession.insert.

These are a few methods in MyBatis for saving or updating data, choose the one that suits your needs.