sql alter

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RMAN backup script writing format and precautions

I. The rman database can be stored in two locations1. control files of the target database;2. Restore the directory; 2. There are two types of storage records in the control file1. records the history of archived log files and the metadata of rman

rman--Combat

##################################Rman Combat###################################以下是一个实战的rman备份脚本BACKUP as compressed backupsetskip inaccessible Filesperset DATABASE PLUS ARCHIVELOG filesperset 20DELETE all INPUT;Compressed: Represents a compressed

Rman automatically backs up the database in Oracle.

Directory1 database modified to Automatic archive mode2 Modifying Rman parameters3 Rman Automatic backup script4 Set up system automatic backup parameters5 Rman RestoreRestore the entire databaseRecover a single table space1 database modified to

MySQL table maintenance and Transformation

MySQL TABLE maintenance and transformation change the column data type www.2cto.com [SQL] alter table visitor MODIFY nam VARCHAR (30); append a new column [SQL] ALTER TABLE visitor ADD age INT; alter table visitor ADD age int first; alter table

Rman recovery scheme and oracle recovery from different machines

Note:① The premise for recovery is that the backup has been completed② A database fault occurs when the database is fully recovered, and no committed data is lost during recovery.Incomplete restoration of the database is a fault in the database.

Incomplete backup Series

Incomplete recovery based on log sequence using rman sql> select * from test;a-----123456sql>hostramn target/ rman>run{allocate channel c1 type disk;bakup full tag 'dbful' format 'd:\backup\full_%u_%s_%p' databaseinclude current controlfile;sql'

RMAN backup and recovery instance

1. Check the database mode:Sqlplus/nologConn/As sysdbaArchive log list (check whether the database is in archive Mode) If not, the database archive mode is modified.Startup MountAlter database archivelogAlter database open 2. connect to the target

V. Restoration and recovery

V. Restoration and recovery5.1 conventional restoration and recoveryThe entire recovery process of RMAN can be divided into restoration and recovery.The difference is that one refers to the restoration and copying of physical files, and the other

MySQL table maintenance and transformation code sharing _MYSQL

Change the data type of a column [SQL] ALTER TABLE Visitor MODIFY Nam VARCHAR (30); Append new Column [SQL] ALTER TABLE Visitor ADD age INT; ALTER TABLE Visitor ADD age INT A; ALTER TABLE Visitor ADD age INT after Nam; Change the position of a

Rman recovery Scheme and Oracle heterogeneous recovery _oracle

Note:The prerequisite for ① recovery is that the backup is done② Full Recovery database is the database encountered a failure, at the time of recovery did not lose any of the submitted things data recoveryIncomplete recovery database is a database

Offsite Rman Recovery Database

Source DB End:Oracle_base=/u01/app/oracleOracle_home=/u01/app/oracle/product/11.2.0/db_1Oracle_sid=ygdgData File location:/U01/APP/ORACLE/ORADATA/YGDGTarget DB

Oracle Backup tool, file naming format, Rman operations

First, common tools:Recovery Manager:rman can only perform hot sparing (mount or open state)Oracle Secure BackupUser-managed Backup: CP/DD [if=/of=/blocksize=]Ii. Name of RmanThe Rman name does not allow duplication, and%u is definitely not

Mysql table maintenance and transformation code sharing

Change the Data Type of a column[SQL]Alter table visitor MODIFY nam VARCHAR (30 );Append a new column[SQL]Alter table visitor ADD age INT;Alter table visitor ADD age int first;Alter table visitor ADD age int after nam;Change column

GoldenGateforOracle Data Consistency Initialization Scheme

GoldenGateforOracle Data Consistency Initialization Scheme GoldenGate for Oracle Data Consistency Initialization Scheme The O & M process is a process that constantly generates new problems and requires continuous research and development. Just

Mysql table maintenance and transformation code sharing _ MySQL

Mysql table maintenance and transformation code sharing bitsCN.com changing the column data type [SQL] Alter table visitor MODIFY nam VARCHAR (30 ); Append a new column [SQL] Alter table visitor ADD age INT; Alter table visitor ADD age int

Mysql table maintenance and transformation code sharing

When the number of tables in the database is large, it is not conducive to maintenance. This article will detail how to maintain the mysql table, and how to modify the mysql table. When the number of tables in the database is large, it is not

Going deep into Oracle-DBA's daily work and responsibilities-[1]

The daily work and responsibilities of DBAs in Oracle --- [1] The following summary is a summary written in "Deep Oracle", which corresponds to the amount of funds learned. 1. Let's take a look at Oracle's learning route: 2. learning basics: I have

Restoration of tablespace and data block media in Oracle Database RMAN recovery

Example 1: The tablespace data file is deleted by mistake.Delete all data files corresponding to the tablespace in the open state.Use alter tablespace... offline for recover offline tablespace in the open state.Use restore tablespace... to dump all

Mysql modifying character set statements

Modify the database character set: [SQL] ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE...]; change the default character set and all CHARACTER columns (CHAR, VARCHAR, TEXT) of the table to the new character set: [SQL] ALTER

[Read-Only tablespace -- restore-1]

1 read-only --- backup read-only fault read-only restoration of faulty data files 2 read-only --- backup read-only writable fault restoration of backup data files, redo recover3 read-only --- backup writable read-only fault restoration of backup

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