SQL*Plus FAQ
What is SQL*Plus and where does it come from?
SQL*Plus is a command line SQL and PL/SQL language interface and reporting tool that ships with the Oracle Database Client and Server software. It can be used interactively or driven from scripts. SQL*Plus is frequently used by DBAs and Developers to interact with the Oracle database.
If you are familiar with other databases, sqlplus is equivalent to:
"sql" in Ingres,
"isql" in Sybase and SQL Server,
"sqlcmd" in Microsoft SQL Server,
"db2" in IBM DB2,
"psql" in PostgreSQL, and
"mysql" in MySQL.
SQL*Plus's predecessor was called UFI (User Friendly Interface). UFI was included in the first Oracle releases up to Oracle 4. The UFI interface was extremely primitive and, in today's terms, anything but user friendly. If a statement was entered incorrectly, UFI issued an error and rolled back the entire transaction (ugggh).
How does one use the SQL*Plus utility?
Start using SQL*Plus by executing the "sqlplus" command-line utility from the $ORACLE_HOME/bin directory. Some of the command line options:
userid/password@db -- Connection details
/nolog -- Do not login to Oracle. You will need to do it yourself.
-s or -silent -- start sqlplus in silent mode. Not recommended for beginners!
@myscript -- Start executing script called "myscript.sql"
Look at this example session:
sqlplus /nolog
SQL> connect scott/tiger
SQL> select * from tab;
SQL> disconnect
SQL> exit
Please note that one must prepare the environment before starting sqlplus.
Linux/ Unix example:
$ . oraenv
ORACLE_SID = [orcl] ? orcl
$ sqlplus scott/tiger
Windows Example:
Click on "Start" -> "Run" and enter "cmd"
C:> set ORACLE_SID=orcl
C:> sqlplus scott/tiger
or...
C:> sqlplus scott/tiger@orcl
What commands can be executed from SQL*
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mssql数据库远程备份的job
/*在远程机器操作系统的计算机管理里建立一个用户名为kyle的用户，密码为1234，同时在那台机器的非系统盘里建一个名为backup的共享文件夹，为了安全另外设置这个文件夹只有这个kyle用户可以访问。*/
declare @sql varchar(500)
select @sql='\\10.2. ......
在数据库查询数据时，我们经常使用一些函数，使我们的查询更加方便快捷，下面就把SQL Server中我们常用的几个函数给列举出来，供参考。
1.字符串函数用户控制返回给用户的字符串，这些功能仅用于字符型数据。
2.日期函数用于操作日期值，我们不能直接对日期运用数学函数。
3.数学函数用于对数值进行代数运算。
4.系统函 ......
此为转贴，但是从连个帖子中收集而来
下面来一起看看论坛里的一个oracle方面的问题：
====================Question
=========================
jmbdat dayt y &n ......
下列语句部分是Mssql语句，不可以在access中使用。
SQL分类：
DDL—数据定义语言(CREATE，ALTER，DROP，DECLARE)
DML—数据操纵语言(SELECT，DELETE，UPDATE，INSERT)
DCL—数据控制语言(GRANT，REVOKE，COMMIT，ROLLBACK)
首先,简要介绍基础语句：
1、说明：创建数据库
......
--都写了 参考下吧
通常，你需要获得当前日期和计算一些其他的日期，例如，你的程序可能需要判断一个月的第一天或者最后一天。你们大部分人大概都知道怎样把日期进行分割（年、月、日等），然后仅仅用分割出来的年、月、日等放在几个函数中计算出自己所需要的日期！在这篇文章里，我将告诉你如何使用DATEADD和DATEDIFF函数 ......
