Oracle

To enable the database to recover quickly from any logic error, Oracle has introduced flash back technology. With this technique, the data changes of row-level and thing-level can be recovered, the time of data recovery is reduced, and the operation

1, in order to avoid errors, the best, in the newly created tablespace, user name and password, and the original user name and password are aKind of, so save a lot of trouble.Part fifth: Some common commands1. Table operationSee which tables the

VS Run Code Error: BadImageFormatException is raised when attempting to load the Oracle client library. This problem occurs if you are running in 64-bit mode with the 32-bit Oracle client component installed.Now the computer running code, the system

Recently studied Oracle, learning faster, and more content, command is not familiar, knowledge point confusion, now re-organized,Three languages of a databaseThe three languages of the database are DDL (data definition Language), DML (Data

1. NVL (column, default) function handles NULLSelect NVL (null,3), NVL (4,3) from dual results shown as 3, 4. Because the first of the NVL is null, the result is the second value, the first one is not empty, and the result is the first valueSelect

Time:Select Sql_id,sid,serial#,username,target, Sql_plan_operation,sofar blocks_read,totalwork total_blocks,round (time_ REMAINING/60) minutes from V$session_longopswhere sofar<>totalworkand Username= ' XXX 'Sofar:units of work do so far for the

WINDOWS10 Remote Desktop Connection error message:Find the method on the internet but what is "WIN10 family" cannot use this method, the specific operation can see the last reference link!!!!Policy Path: Credential assignment, System, computer

--Query row lock statementSelect Sql_text from V$sql a,v$session bwhere a.sql_id=b.sql_id and b.event= ' enq:tx-row lock contention ';--Find the table that is lockedSELECT object_name, Machine, S.sid, S.serial#from gv$locked_object l, dba_objects o,

SELECT * FROM (select RowNum rn,e2.* from (select e1.* from EMP E1) E2 where rownum=6;SELECT * FROM (select RowNum en,e.* from emp e)Select E.deptno,e.ename,d.dname,e.mgr,s.gradeFrom (select AVG (SAL) ea from emp) e1,emp E,salgrade s,dept Dwhere

The workaround is as follows: 1. Start Oracle with the CMD Command window (preferably as an administrator)C:\Users\Administrator>sqlplus /nologSQL>conn /as sysdba 或者这种 conncet sys/[email protected] as sysdba //sys是用户名 123456是密码 。

This article transferred from: https://www.cnblogs.com/Springmoon-venn/p/7016409.htmlOracle uses multiple fields when inThis is just a need.Recently there is a need to filter out a bunch of products in a number of specific types of goods, suppliers

SELECT Tablespace_name,Megs_alloc "Size (m)",Megs_free "Free (m)",Megs_used "Used (m)",Pct_used "Usage (%)",Max "Max (m)",Pct_max "Usage pct of max%",STATUS,CONTENTSFrom (with TBAs (SELECT A.tablespace_name,ROUND (a.bytes_alloc/1024/1024) Megs_alloc,

1. View Tablespace usage informationSelect A.tablespace_name "Table space name",Total "Table space size",Free "Table space remaining size",(total-free) "Table space usage size",Total /(1024 * 1024 * 1024) "Table space Size (G)",Free /(1024 * 1024 * 1

Start_ip_num = Rset->getnumber (1);End_ip_num = Rset->getnumber (2);2988 Info_log ("getiplibraryfromoracle data rset [%zu,%zu,%d]\n", Rset->getnumber (1), Rset->getnumber (2), rset- >getnumber (3));Src/resulttodb.cpp:2988:warning:cannot Pass objects

1. Download Databaselibrary2. Install an Oracle support library: cx_oracleWindows can download the. exe to install, this library is: https://pypi.python.org/pypi/cx_Oraclehttps://pypi.python.org/pypi/cx_OracleThe number of bits to download is the

Requirements: We need to organize the table space created by the site user and its storage data, and standardize management. When organizing the table space created by the user, it is necessary to exclude the table spaces that non-user creates, all

1. Open Sqlplus Login and create Export data store directory sqlplus/as sysdba Direct return without entering the password　　Create or replace directory Databak as ' D:\bak\temp ';　　 SELECT * from Dba_directories; --See if the path is set

When you upgrade a production server, or replace a database server, and build a test environment, you need to back up the production database and possible future restores.1.EXPDP ExportEXPDP DMS/123456 version=10.2. 0.1. 0 Directory=data_pump_dir

--a preliminary understanding of Oracle--procedure,--1.1 Create a complete procedure with the following formatCreate or replace procedure Procedure_nameIs/asBeginSubjectexceptionException Handling BodyEnd procedure;Procedure_name is the process

1.Java Code Execution Oracle,update and INSERT statements do not stay stuckWorkaround: This is caused by the fact that you performed an update or insert operation before, but you did not commit, causing the record of your operation to be locked by