Do I have to learn how to design databases to become a java developer?

Question

i'm practicesing wih tables and DB with Java, and i dont know if i need just to know how to open and modify already created databases or if I need to understand more about them.

Answer 1

yes it will help a lot

learn a database design system

i use merise as i'm accustomed to
french

else don't forget UML

if you know
sql etc that is the normal stuff

Answer 2

As a developer, you will most likely only operate with opening and editing databases, as you mentioned in your question, but I think that it's very important to know a bit more about DBs and SQL-syntax if you're going to work with them. By knowing how a DB is made, and knowing how a DB should look like, what rules they should follow etc., you will be a much better developer, and this knowledge might prove useful in tricky situations that might occur when working with DBs.