When you select data, there’s a good chance that you’re looking for something specific. In using the SELECT statement you can attach a WHERE clause to limit the data that you are looking through. If you’re very good and know what you’re looking for then you can use the WHERE clause to find exactly what you want.
Creating a user
Like table names and columns, a user name must follow the same rules. There is one minor difference. A user name can contain a dollar sign.
CREATE USER username [ IDENTIFIED BY password ] [ PASSWORD EXPIRE ]
A database object is anything that has a name and a defined structure. Other database objects that are used in Oracle 10g are sequences, indexes, and synonyms.
Inserting DataSyntax INSERT INTO tablename [(columnname, ...)] VALUES (datavalue, ...); When inserting data if you are inserting a full row of data, placing data in all columns then you can omit the column names as long as you follow the order of the columns in the table.
|PRIMARY KEY||_pk||This is a unique field that is not allowed to have null values.|
|FOREIGN KEY||_fk||This constraint is placed in the "many" table.|
When creating tables in Oracle we have to follow some rules in order to successfully create a table:
With every new operating system comes headaches as we find that our favorite programs or hardware no longer works with it. If you're like me, you're probably being forced into using Windows because everyone else does. Then again, if I had Linux installed on my box along side Vista, I'd feel a bit dirty and I'd be using a real boot loader like GRUB. In Vista Microsoft did away with the ntldr.exe and boot.ini files and replaced it with a new program.