Where to begin with databases

Hi
My next step is to create a database for my application. I am very confused wtih this subject, and I need to understand some primary issues.
first, Do I need a DBMS like Oracle or MySQL?
since many of my friends say : "You need Orcale or SQL" I answer "But SQL is a language" they reply "We dont know"!!? maybe they mean MySQL.
second, If we really need a DBMS, then is there any for free?
third, can't I create Notepad files and work with as a database?
can I use MS-Access?
last, and Inside java what packages we are gonna use?
Next week i'm planning to buy the Advanced Java J2SE book by Dietel and Dietel. Do you recommend it for this subject?

first, Do I need a DBMS like Oracle or MySQL?
since many of my friends say : "You need Orcale or
SQL" I answer "But SQL is a language" they reply "We
dont know"!!? maybe they mean MySQL. SQL, or Structured Query Language, is the language used by all relational databases. Oracle and MySQL are both relational database products, and both use SQL.
second, If we really need a DBMS, then is there any for free?Oracle and M$ SQL Server will cost you. MySQL, PostgreSQL, HypersonicSQL are all free. I'm sure there are others.
third, can't I create Notepad files and work with as a database?You mean store your data in text files? Sure, but you won't be able to use SQL to query, update, insert, or delete records. Flat text files are pretty old technology (think 60s/70s), before relational databases took over.
can I use MS-Access?Yes, M$ Access has a SQL engine inside it.
last, and Inside java what packages we are gonna use?Look at java.sql and javax.sql.
Next week i'm planning to buy the Advanced Java J2SE
book by Dietel and Dietel. Do you recommend it for
this subject?Absolutely not. I can't recommend that book for anything.
%

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