Oracle

Concepts and differences of the Oracle server private mode and Sharing Mode--------------------------------------------------------------- The sharing mode applies to the concept of a connection pool similar to that of the connection pool. However,

Create or replace view v_timedimensionSelect to_date (A. starttime, 'yyyy-mm-dd hh24: MI: ss') as starttime, substr (A. starttime, 1, 4) as year,Substr (A. starttime,) as month, substr (A. starttime,) as day,-- Substr (A. starttime, 1, 13) | ': 00: 0

 MTS (multi-threaded server) is an optional configuration option for Oracle server. Compared with the dedicate method, MTS has the biggest advantage of not increasing physical resources (memory) supports more concurrent connections. In other words,

An Oracle ORA-01033 power failure or network disconnection may occur 1. Go to CMD and run set oracle_sid = fbms to ensure the correct Sid is connected; 2. Run sqlplus "/As sysdba" SQL> shutdown immediate to stop the service SQL> startup Start the

From: techtarget Mike Ault The term "Myth" refers to the basic situation of Oracle's behaviors that have never been true or have been true, but are not true. The root cause of most Oracle mythology is the result of a

Nowadays, Oracle databases are favored by more and more enterprises for their high reliability, security, and compatibility. Many database administrators are concerned about how to maintain excellent performance for Oracle databases. I suggest you

/* Formatted on 4:51:00 (QP5 v5.149.1003.31008 )*/SELECT *FROM (SELECTA. lot_id,A. shift_start_timekey,A. event_name,A. old_oper_code,A. oper_code,'-',LAG (old_oper_code, 2) OVER (order by lot_id, event_timekey)Previus_2,LAG (old_oper_code, 1) OVER (

Document directory PLSQL varrays Http://www.smart-soft.co.uk/Oracle/oracle-plsql-tutorial-part-11.htmPLSQL (Varrays) Varrays are one-dimenys, variable length arrays, with the maximum length defined in the declaration. these are used when it is

Chapter 1: Log Management 1. forcing log switches SQL> alter system switch logfile; 2. forcing checkpoints SQL> alter system checkpoint; 3. adding online redo log groups SQL> alter database add logfile [group 4] SQL> ('/disk3/log4a. rdo',

/* -- Function: Convert the string to the year, month, and day format, and delete the time, minute, and second. -- Source: http://jorkin.reallydo.com/article.asp? Id = 529 -- Parameter: Datechar varchar2 -- Oracle9i passed the test */ Create or

Basic command: group by cube (Field List ); The CUBE command generates different permutation and Combination Based on the field list, and generates statistical summary based on each combination result. For example: group by cube (city, job, age);

1. mssql   Use two TOP commands to obtain the paging data we want, for example:Select * from ( Select top ( PageSize ) * From ( Select top ( PageSize * PageIndex )* From articles Order by pubtime DESC ) Order by pubtime ASC ) Order by pubtime DESC

Yesterday I chatted with my colleagues about ORACLE data backup. The imp/exp Command did not provide progress information and only showed the name of the currently processed object (tables, views, etc. So I thought of a backup recovery applet I

Today, I don't know what's going on. I just took the machine out of the domain and prepared to handle the control of oracle11g. At first, I did not care much about it. I searched for some information on the Internet and followed it. Then I did

This article mainly introduces common methods of RMAN, including the author's experience, the experiment is also basically successful in Windows 2 K and ORACLE 8.1.6 environments (because this environment is easier to implement ).　　This article

Em cannot be viewed and cannot be monitored. At the same time, his listening service is still normal. I made two steps to modify it. The most common cause of this problem is IP address changes or other causes, which make the machine name or IP

Reference 1. Explicit cursor Explicit is relative to implicit cursor, that is, there is a clear declared cursor. The declaration of an explicit cursor is similar to the following (for detailed syntax, refer to plsql ref doc ): Cursor cursor_name

Q. 1: The Database must be in this mode for the instance to be started 1. MOUNT2. OPEN3. NOMOUNT4. None 3 　　Q. 2: When Oracle startups up, what happens if a datafile or redo log file not available or too upted due to O.S Problems1. Oracle returns a

Note: This document describes how to install the oracle database in linux. The method for installing oracle in other unix environments is basically the same. This installation guide is a general document, it is applicable to various oracle database

This document uses examples to teach you how to implement the select top n method in Oracle.1. implement select top n in Oracle:Since ORACLE does not support the select top statement, order by and ROWNUM are often used in ORACLE to query the select