Oracle learning (I)

One 、Oracle Database download and installation

1.1 Oracle install

Oracle In terms of actual development ,Oracle 11g It's more used , also Oracle Development is mainly divided into two categories ：
① Database management class ：DBA
② Database programming ：SQL Programming 、PL/SQL Programming （ Subroutines （ Stored procedures and functions ）、 trigger 、 object-oriented 、 The cursor ）.

If you download Oracle Direct login ：www.oracle.com. When downloading, you can choose , Download yes 2 Compressed packages . For this 2 Compressed packages , It is recommended to decompress them separately and merge them into one installation and startup .
“oracleadmin”

Two 、Oracle Key user information for

Passwords for four users ：
· Super administrator ：sys / change_on_install
· General administrator ：system / manager
· Ordinary users （ Unlock ）：scott /tiger （ It's about choosing “ sample ” The scheme database is then generated ）
· Big data users ：sh / sh

3、 ... and 、Oracle Service issues

Computer – management – service – Put all the oracle Services are set to start manually .

Four 、 Format operation

SET LINESIZE Numbers ;
SET PAGESIZE Numbers ;
COL Field name FOR A Numbers ;
Create text ：ed file name . Suffix name （ for example ：ed hello.txt）
Show users ：CONN user name [/ password ] [AS SYSDBA]

Switch command ：

HOST command
HOST COPY Copy path file Copy path file