Oracle

How to confirm the time zone of 11.2 RAC Grid Infrastructure this document describes how to modify the time zone settings of the GI after installing 11.2 Grid Infrastructure. Once the OS default time zone is modified, make sure that the following

The SQL/Oracle Method for retrieving records from the MTH to the n th to use a single SQL statement to retrieve records from the Table from the MTH to the n (Not In version) select top n-m + 1 * FROM Table WHERE (id not in (select top S-1 id FROM

Database stored procedures, packages, function syntax drop table student; create table student (stuNo int primary key, Name varchar2 (10), address varchar2 (30), birthday date ); insert into student values (1, 'mei chaofeng ', 'shandong', to_date ('2

Basic Steps for connecting to a remote Oracle database on Mac 1. Open the terminal and enter ssh to see [plain] chenmatoMacBook-Pro :~ Nono $ ssh usage: ssh [-1246 AaCfgKkMNnqsTtVvXxYy] [-B bind_address] [-c cipher_spec] [-D [bind_address:] port]

Example of using a ref cursor SQL code create or replace procedure operation IS type cur_userId is ref cursor; -- the swimming buoy defines c_msgUserIds cur_userId; c_actionUserIds cur_userId; c_msgUids cur_userId; mysql varchar2 (4000); n_msgUserId

A Brief Introduction to the efficiency of creating a database view the main purpose of creating a view is to facilitate data query, but not to improve the query efficiency. To improve the efficiency, you can only optimize it through other methods,

Summary of typical Oracle SQL statements @ SQL-plus key functions in series and SQL statement cases @ Chinese sorting details) 1. classic select SQL statement // note: the result obtained by a mathematical expression containing null values is a null

Oracle analysis function RANK ()RANK () is both an aggregate function and an analysis function.The syntax is as follows:Aggregate Function Syntax: Syntax of the analysis function: RANK calculates the level of each value in a group value and returns

Oracle user related operations currently orcl databases use sys as sysdba to create users: create user epa_dev identified by epa_dev default tablespace NNC_DATA01 temporary tablespace temp; grant create session to epa_dev; grant create table to

Comparison of differences between full ORACLE backup and 0-level Incremental backup FullA backup of a datafile that includes des every allocated block in the file being backed up. A full backup of a datafile can be an image copy, in which case every

Flashback table uses the data in the undo tablespace to implement data rollback. To perform flashback on a table, you must always grant row movement to the table. Otherwise, an error occurs. Let's make an experiment to verify it: first check scott.

The SQL code create or replace package p_view_param is function set_param (num varchar2) return number; function get_param return varchar2; end p_view_param; create or replace package body p_view_param is paramValue varchar2 (4000); function

Oracle Application Record 1. Delete the data in the oracle recyclebin table purge recyclebin 2. Enable and stop recyclebin alter system set recyclebin = off; the system has changed alter session set recyclebin = off; session has changed. 3. The

In addition to PL/SQL Developer, the oracle client is also required. A more convenient method is to use the oracle thin client, download is available in many places, with very small files and less resource consumption. After the installation is

The partition table partition granularity is too large to solve the oracle database. performance problems occur in the afternoon. 1. Check the cpu, memory, io, and other performance parameters of the two servers and find that the CPU usage is close

Summary of Oracle 10g SYS user authentication method OS: Red Hat Enterprise Linux AS release 4 (Nahant Update 2) uname-r: 2.6.9-22. ELDB: Oracle Database 10g Release 10.2.0.1.0 first case: Set the initialization parameter remote_login_passwordfile

ORACLE library cache lock query select Distinct/* + ordered */w1.sid waiting_session, h1.sid holding_session, w. kgllktype lock_or_pin, od. to_owner object_owner, od. to_name object_name, oc. type, decode (h. kgllkmod, 0, 'none', 1, 'null', 2,

DML statement and table join Cartesian Product: (1992) SQL> select ename, dname from emp, dept; (1999) SQL> select ename, dname from emp cross join dept; query the same number in the middle of emp and dept: SQL> select ename, dname from emp, dept

Oracle common tuning methods Oracle database application system optimization mainly includes ten aspects: (1) optimizing database memory; (2) fixed application code in the Oracle shared pool; (3) optimizing data storage; (4) optimizing data sorting;

Oracle Stored Procedure encryption, as the name suggests, is the encryption of the Oracle stored procedure source code, so that others do not see your source code, to achieve the purpose of protection, of course, not everything is needed. Some