Oracle

1. Installation and operating environment# yum Install gcc-c++Note: Both gcc-c++ and Libstdc++-devel will be installed at this time.2. See if the g++ is installed successfully[[Email protected] Desktop]# g++-VUse built-in specs.Target: X86_64-redhat-

Specifically for rownum It is the number of the Oracle system order assigned to the rows returned from the query, the first row returned is assigned 1, the second row is two, and so on, this is a field that can be used to limit the total number of

The first step, bat script:@echo offecho Delete the spare files and logs from 10 days agoforfiles/p "Z:/back"/M *.dmp/d -10/c "cmd/c del @path"forfiles/p "Z:/back"/M *.log/d -10/c "cmd/c del @path"Echo is backing up the Oracle database, please wait

The original standard for RENAME operation: RENAME loganalysis to Loganalysis_bak; Compress backup table: ALTER TABLE loganalysis_bak move compress; View the index field of the backup table: SELECT * from User_cons_columns where table_name= '

Select Sysdate from dual;Select Systimestamp from dual;Select Localtimestamp from dual;Select Current_timestamp from dual;Select Dbtimezone from dual;Select Sessiontimezone from dual;Select To_timestamp (' 2015-11-06 10:35:00 ', ' yyyy.mm.dd hh24:mi:

Today, when looking at a data sheet of a legacy system, we find that the view that we look for is a full-out join, which results in some restrictive processing of the data records, and can also be achieved by setting the view tables as right outer

CREATE OR REPLACE Package pak_02 is--Header--Here you can define public parameter function fun_01 RETURN number; PROCEDURE pro_01; END; CREATE OR REPLACE Package Body pak_02 is----Here you can define a private variable function fun_01 return number

Connect to the remote CDB and prepare the remote PDB for cloning.Select from V$pdbs; con_id DBID NAME open_mode------------------------------------------------------------ 2 1258043702 pdb$seed READ only

[Email protected] admin]$ CD $ORACLE _home/network/admin[email protected] admin]$ cat Tnsnames.ora# Tnsnames.ora Network Configuration File:/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora# Generated by Oracle configuration

To start DB12 as an example' /as sysdba ' SQL 12.1. 0.2. 0 1 :1982, Oracle. All rights reserved. Connected to an idle instance.1.nomount StageSql> startup Nomount; 1174405120 bytesfixed Size 2923680

Parsing Oracle's RowNumFor rownum It is the number of the Oracle system order assigned to the rows returned from the query, the first row returned is assigned 1, the second row is 2, and so on, this pseudo field can be used to limit the total number

After creating the user, the user can not do anything, the login database will be reported Ora-01045:user Xiaoming lacks CREATE SESSION privilege; Logon denied error. At this point, we should give the user authorization. First, learn about Oracle's

A summary of Oracle transactions1. What is a transaction and what is the nature of the transaction? The task of a transaction is to transform a database from one state to another, unlike a file system, which is a database-specific use. It has four

1 preparationCentOS 5.6 Enterprise Edition oracle11g FS installation. The installation environment is a VMware virtual machine. In addition, this installation document is very concise, but the key steps are pointed out, the other is the default

Oracle Trunc function handles date formatsSelect TRUNC (Last_day (sysdate)) +29+20/24 from dual--what time of day next month2015/11/29 20:00:00Select Add_months (TRUNC (sysdate, ' mm '), 1) +5/24 from dual--next month number 1th2015/11/1

Oracle queries the data of one table and inserts it into another table. 1. Add a new table through the structure and data of another table Create table XTHAME. tab1 as select * from DSKNOW. COMBDVERSION 2. If the table exists: Insert into tab1

Steps for creating an Oracle database manuallyWrite initialization parameter file settings operating system environment variable create instance connect database as Administrator Start instance create database run data dictionary script Oracle

Atitit. database partition design attilax Summary1. partitioning is the principle of partitioning in different categories of folders (what) The basic principle of partitioning is to access a table or a small part of the index, rather than accessing

Oracle learning records: use custom functions and triggers to dynamically generate primary keys. I wanted to write Oracle functions and triggers for a long time. A recent example from a textbook gave me this opportunity. Now, I have recorded what I

Atitit. attilax Summary of common partition APIs, atititattilax Atitit. attilax Summary of common partition APIs     1. Api source and oracle and mysql1 1.1. partition definition partition by range (uid) use the values less than operator to set 1 1.1