Oracle

I. Oracle's (Resource limit) profileto control the use of system resources , resources can be used to limit profiles. Resource restriction profiles are an important part of Oracle's security policy, and resource restriction profiles allow you to

I. SQL ClassificationDDL: Data Definition language (Language)DML: Data manipulation language (manipulation Language)TCL: Transaction Control Language (Transaction control Language)DQL: Data Query Language (Language)DCL: Data Control Language

A RAC cluster of a newly installed Oracle 11GR2Three nodesCreate a good database, everything is in normal progressThen went to install an Oracle client, and when the link was made there was a ORA-12545Then a simple Baidu, some people say is 11gr1

Summarize Oracle system views and table Daquan:Dba_ opening .....Dba_users Database user InformationDba_segments Table Segment InformationDba_extents Data Area InformationDba_objects Database object InformationDba_tablespaces database table Space

Topic One: Oracle queries1.where Query The department number is 1 Department information Select *fromwhere deptno=1; The query name is an employee of KW, the string uses ' ', the content is case sensitive Select

Control Panel → Services Find about ORCL Total 7 services:After the successful installation of Oracle 11g, a total of 7 services,The meanings of these seven services are:1. Oracle ORCL VSS Writer Service:Oracle Volume Mapping copy write service, VSS

select log_mode,open_mode ,database_role from v$database; --View Dataguard Master Standby status Select  status from v$instance; --View Database Status alter database recover managed  standby database cancel; --canceling the log application

Date Processing Time Date type The date datetime type, which contains the time portion of the year, month, day, hour, minute, second, not containing the number of decimal digits and time zone of the second. Valid data range is January 1, 47

CommandDescriptionCrsctl start hasStart the database has service.CRSCTL Stat res-tCheck the status of each service (DG, monitor, asm instance, etc.) in ASM.SRVCTL Status ASMView the ASM instance state, normally the ASM instance of the master standby

1.Select query data in the tableSelect * from Stu;---Query the stu table for all data, * represents all2.dual , pseudo-table, the data to be queried does not exist in any table when usedselect sysdate from dual;----Query the current time of the

Query for WHERE statement--WHERE clause--The Enquiry department number is 10 of all employeesSelect * fromEmpwhereDeptno= Ten;--employees in the enquiry department with a salary of 3000Select * fromEmpwhereSal= the;--find the employee with number

The example in this article describes how C # calls Oracle stored procedures. Share to everyone for your reference. The implementation method is as follows:The Oracle database code is as follows: The code is as follows:Create or Replace procedure

This document contains almost every aspect of Oracle cursor use, and all passes the test--declaring cursors; cursor cursor_name is select_statement--for Loop Cursors--(1) Defining cursors--(2) Defining cursor variables--(3) Use this cursor with a

Common versions of Oracle databases In the development of Oracle database, the database has been in a state of continuous upgrade, with the following versions: Oracle 8,oracle 8i:oracle 8i means Oracle is formally evolving to the

Blob refers to the binary large object is the English binary Large objects written;CLOB refers to a large character object that is written in English character Large object.So both types are designed to store large amounts of data, where blobs are

DUMP function is a useful for this purpose.Sql> Select Dump (C1) from test;DUMP (C1)---------------------------------------------typ=96 len=4:48,49,53,48typ=96 len=4:48,48,49,48typ=96 len=4:48,48,53,48typ=96 len=4:48,49,48,48Where:TYP is the Oracle

(Les19 Regular expression support) [20180106], les1920180106Learning objective-regular meta-string-use regular search in SQL statements-use regular matching in SQL statements-use regular expressions in SQL statements to replace string regular

Oracle CDC incremental test code instance, oraclecdc Create a tablespace Create a temporary tablespace ================================================= create temporary tablespace test_temptempfile 'e:\oracle\oradata\cdctest\test_temp01.dbf'size 32

Oracle tablespace temporary tablespace Information Query tutorial, oracle Information Query I have been dealing with oracle databases for work in the past two days. Now I am writing my own thoughts and sharing them with you. If something is wrong,

Oracle queries the average SQL Execution time (Code instance) through the v $ SQL view, oraclesqlOracle queries the average SQL Execution time (Code instance) through the v $ SQL View) SELECT SQL _TEXT, EXECUTIONS total EXECUTIONS, ELAPSED_TIME/1000