Oracle

1. Unzip the Instantclient_12_1-x32.rar file and extract it below Instantclient_12_1-x32\network\admin\tnsnames.ora, Find Tnsnames.ora This file, configure the details in this fileIf the client is not installed locally, you can configure it as

1. Go directly to the Sqlplus command promptSqlplus/nolog2. Connect as OS IdentitySqlplus/as SYSDBA orConnect/as SYSDBA3, Normal User loginSqlplus scott/123456 orConnect scott/123456 orConnect Scott/[email protected]4. Log in as AdministratorSqlplus

Case----If I want to query a point in time: 2018-01-12 between 9:00--9:12, a RAC node, a SQL execution plan, how to handle it?There are only four Display_awr parameters, namely: sql_id, Plan_hash_value, db_id, format, and no time and node inst_id

1. View open UsersSelect Username,account_status,expiry_date,profile from Dba_users;2. View current password expiration policySELECT * from Dba_profiles s where s.profile= ' DEFAULT ' and resource_name= ' password_life_time ';3. Modify Password

Oracle is not case-sensitive, and do not know MM, so instead of Mi,yyyy/mm/dd HH24:MI:SS, in order to avoid errors, write the time to capitalize.Start_up_time type is date typeThe Completion_time type is NVARCHAR2 and the value format is 2011-11-23 0

--Query the top three of the highest salary (the feeling of paging)SELECT * FROM(SELECT * from emp ORDER BY sal Desc) twhere RowNum --Query for 4 to 6 of the highest wages (page-by-row number selection three steps)SELECT *From (select T.*,rownum rn

Oracle's start with connect by Prior is based on the conditional recursive query "tree", divided into four types of usage:First type: Start with child node id= ' ... ' Connect by prior child Node ID = parent Node IDSELECT * FROM Mdm_organization o

Note in advance: This is the default Oracle has been installed to cut the database default tablespace has been created well. The data table DMP file is then imported directly into the default tablespace (the default tablespace is no longer specified

Turn from 52350922modifying process in Oraclein Oracle, you should always look at process (number of processes):To View the maximum number of processes in Oracle : sql> Select COUNT (*) from v$session #连接数sql> Select Count (*) from v$session where

Note: If the reader is in the presence of a listener that does not start please refer to my record solution: http://blog.csdn.net/johnstrive/archive/2009/08/06/4418481.aspxThe Oracle database is heavyweight and its management is complex, and it

Note:1. The text annotation explains the picture above.2. This document is an experiment in a virtual machine, and the actual production environment may encounter other problems. If you have a problem that can't be solved, please contact me.Spit

The recent Zabbix Alert RAC Library table space usage exceeds 75% needs to be expanded, this document records the change operation.1. Table Space ViewSet pages 999set linesize 999SELECT a.tablespace_name "tablespace name", 100-round ((NVL

1,oracle no offet,limit, in MySQL we use them to control the number of rows displayed, most of it is paging. If Oracle is paging, replace it with RowNum.2,oracle Build the table, there is no auto_increment, all want to let the table of a field

Oracle Database Storage Usage queriesCreate a view using the system SYS or DBA authority account as follows: This is mainly obtained from table dba_data_files,dba_segments two tables in the database. The default database holds a byte unit

Oracle Database Manipulation Language: DML Add data: (1) Add data directly: INSERT INTO table_name (column_name1,column_name2,...) VALUES (Data1,data2 ...);(2) is added via other data tables (the target table already exists): INSERT INTO table_name (

(iii) installation of the ORACLE databaseExtract the "Resources" folder ORACLE installation package to the system of the virtual machine and double-click the setup.exe in the extracted directory, the installation interface appears as follows:Enter

I. Introduction of ORACLE(a) What is ORACLEOracle database system is one of the most popular client/server (client/server) or B/s architectures in the United States Oracle Corporation (Oracle) provides a distributed database-centric set of software

One, Oracle transactions• The meaning of a transaction: a transaction is a logical unit of business, in order to ensure that all operations of the data are either completed or all fail.1. The beginning of a transaction begins with an SQL statement

Many times writing scripts, or data export import, we may use some system default playable or filter with schema:ANONYMOUSapex_030200Apex_public_userAppqossysBI USERSCtxsysDbsnmpDIP USERSExfsysFlows_filesHR USERSIX USERSMddataMdsysMgmt_viewOE

If you are not yet installing an Oracle database that you can connect to, download the last-line installation first. Refer to the Oracle documentation for instructions on installation.When you set up your Oracle server: The character set must