ORACLE导出和导入实用程序

Oracle取前N位SQL

也许对SQL Server来说,取前N位的数据是很简单的事情,一条TOP语句就搞定了.
在Oracle中我们往往会感觉到头疼,平日里也常会用到,主要是使用partition by.
语法如下:
select emp_card_no,work_date,read_card_date,count(rownum) as cnt
from hra_read_car ......

Oracle数据导入导出imp/exp

功能：Oracle数据导入导出imp/exp就相当与oracle数据还原与备份。大多情况都可以用Oracle数据导入导出完成数据的备份和还原（不会造成数据的丢失）。
　　Oracle有个好处，虽然你的电脑不是服务器，但是你装了oracle客户端，并建立了连接（通过net8 assistant中本地——>服务命名添加正确的服务命名
　　� ......

Oracle Sql技巧 Upsert, Multitable Insert, Undrop

UpSert功能：
MERGE <hint> INTO <table_name>
USING <table_view_or_query>
ON (<condition>)
WHEN MATCHED THEN <update_clause>
WHEN NOT MATCHED THEN <insert_clause>;
MultiTable Inserts功能：
Multitable inserts allow a single INSERT INTO .. SELECT statement to ......

Two papers on Oracle 11g Security

Hey all,
Since there seems to be a fair bit of disinformation, and utter nonsense,
floating around since my talk at the Black Hat Federal security conference
the other day, I have decided to publish the following papers.
http://www.databasesecurity.com/HackingAurora.pdf
http://www.databasesec ......

ORACLE过程、函数

过程、函数

create or replace procedure p1
is
empname emp.ename%type;
begin
select ename into empname from emp where empno=7788;
dbms_output.put_line(empname);
end;

SQL> ed
SQL> /

Procedure created

SQL> exec p1; ......