• db2操作 连接、备份、恢复db2


    先deactivate后再start standby再primary
    报错不能启动hadr standby的时候,先restore,但是别rollback,直接start hadr as standby

    先把hadr起来后再推icm

    1、先把所有的库的hadr stop了
    2、把primary的库离线备份
    3、在副节点db2stop force ,再start(可以保证是处于deactivate(其实db2 DEACTIVATE DATABASE cinder就行)的状态,然后再restore)
    4、db2 get db cfg for ceilodb2 | grep "Path to log files" 删除得到的文件夹里面所有文件比如得到node/ 就rm -rf node/*
    5、在副节点restore(千万别rollback)
    6、在副节点start hadr as standby
    7、db2 ACTIVATE DATABASE cinder
    8、在主节点start hadr as primary

    db2默认需要切换到db2inst1这个默认用户才能执行操作

    [root@localhost instance]# su - db2inst1


    [db2inst1@localhost ~]$ db2start


    [db2inst1@localhost ~]$ db2 force application all


    [db2inst1@localhost ~]$ db2stop


    [db2inst1@localhost DB2]$ db2stop force


    显示所有的实例
    [db2inst1@localhost ~]$ db2ilist


    显示当前的实例
    [db2inst1@localhost ~]$ db2 get instance


    删除一个实例(注:需切换到root用户权限下)
    [root@localhost ~]# cd /opt/ibm/db2/V9.7/instance
    [root@localhost instance]# pwd
    /opt/ibm/db2/V9.7/instance
    [root@localhost instance]# ./db2idrop db2inst1
    DBI1070I Program db2idrop completed successfully.


    列出当前实例中有哪些数据库
    [root@localhost instance]# su - db2inst1
    [db2inst1@localhost ~]$ db2 list db directory


    创建数据库
    [root@localhost instance]# su - db2inst1
    [db2inst1@localhost ~]$ db2 create database test


    连接数据库
    [db2inst1@localhost ~]$ db2 connect to test


    注:用密码情况下格式[db2inst1@localhost ~]$ db2 connect to test user username using password
    db2 connect to <database> user <username> using <password>


    列出当前实例中所有激活的数据库
    [root@localhost ~]# su - db2inst1
    [db2inst1@localhost ~]$ db2 list active databases


    查看表的空间
    [db2inst1@localhost ~]$ db2 list tablespaces [ show detail ]


    列出数据库中所有用户表
    [db2inst1@localhost ~]$ db2 connect to test
    [db2inst1@localhost ~]$ db2 list tables


    创建表
    [db2inst1@localhost ~]$ db2 "create table student (id int,fname varchar(30),age int)"


    向表student中添加数据信息
    [db2inst1@localhost ~]$ db2 "insert into student values (1,'Tom',22)"


    显示表student所有的信息
    [db2inst1@localhost ~]$ db2 "select * from student"


    更新数据
    [db2inst1@localhost ~]$ db2 "update student set age=22 where fname='Sunrier'"


    查看表student结构
    [db2inst1@localhost ~]$ db2 describe table student

    [db2inst1@localhost ~]$ db2 "describe select * from student"


    修改一个表的字段类型(如表people中的fname字段把varchar(30)改为varchar(28))
    [db2inst1@localhost ~]$ db2 describe table people

    [db2inst1@localhost ~]$ db2 "alter table people alter column fname set data type varchar(28)"


    向一个表添加字段(如向表people中添加备注信息字段notes;向表people中添加分数字段score)
    格式:db2 "alter table <tablename> add <columnname> <datatype>"


    [db2inst1@localhost ~]$ db2 "alter table people add notes varchar(100)"

    显示当前数据库连接有哪些应用程序
    [root@localhost ~]# su - db2inst1
    [db2inst1@localhost DB2]$ db2 list application

    导出表中的数据

    以DEL格式导出
    db2 "export to teacher.txt of del select * from teacher"
    db2 "export to teacher_bak.txt of del modified by coldel| select * from teacher"
    [db2inst1@localhost ~]$ ls
    db2inst1 sqllib Sunrier teacher.sql TEST.0.db2inst1.NODE0000.CATN0000.20120817103306.001
    [db2inst1@localhost ~]$ db2 "export to teacher.txt of del select * from teacher"
    SQL3104N The Export utility is beginning to export data to file
    "teacher.txt".

    备份数据库(如防止表误操作)
    格式:db2 backup db <database name> [ to <dir name> ]
    [db2inst1@localhost ~]$ db2 backup db test
    SQL3105N The Export utility has finished exporting "2" rows.

    恢复数据库(如将一个表删除后,通过删除前的备份文件恢复)
    格式:db2 restore db <database name> [ from <dir name> ]
    database name:表示恢复的数据库名

    from <dir name>:表示为从哪个目录路径下恢复,为可选项,默认在当前目录下
    [db2inst1@localhost ~]$ db2 connect to test
    注:如果想把恢复的数据库更改为新的数据库名,则格式如下
    db2 restore db <database name> [ from <dir name> into <new database name> ]
    例:db2 restore db test from /home/db2inst1/Sunrier into testdb
    或者db2 restore db test from "/home/db2inst1/Sunrier" into testdb


    .查看test数据库备份的历史记录
    格式:db2 list history backup all for <database name>
    [db2inst1@localhost ~]$ db2 list history backup all for test


    查看错误码信息
    [db2inst1@localhost ~]$ db2 ? 22003
    SQLSTATE 22003: A numeric value is out of range.

    ======================================back up ========================================
    db2 list db directory

    1、离线全备份
    db2 force application all
    1)、首先确保没有用户使用DB2:
    db2 list applications for db sample
    2)、停掉数据库并重新启动,以便断掉所有连接:
    db2stop force
    db2start
    3)、执行备份命令:(使用TSM作为备份的介质)
    db2 backup db sample use tsm
    备份成功,将会返回一个时间戳。
    4)、检查备份成功:
    db2 list history backup all for sample 可以看到多了这个备份的纪录。
    db2adutl query 命令也可以看到返回值。

    5、恢复数据库

    db2 restore db GLANCE from /var/wenbin/backup

    当恢复后需要连接数据库的时候报错

    Last login: Wed Jan 30 02:23:23 2013

    [root@localhost ~]# su - db2inst1

    [db2inst1@localhost ~]$ db2 connect to sample

    SQL1117N  A connection to or activation of database "SAMPLE" cannot be made 

    because of ROLL-FORWARD PENDING.  SQLSTATE=57019

    ####这个提示是说需要前滚期间的日志才能激活数据库

    执行下面的语句:

    db2 rollforward db GLANCE to end of logs and stop

    db2 import to c:dftz.ixf of ixf commitcount 5000 messages c:dftz.msg insert into dftz
    db2 import to c:dftz.ixf of ixf commitcount 5000 insert into dftz
    db2 import to c:dftz.ixf of ixf commitcount 5000 insert_update into dftz
    db2 import to c:dftz.ixf of ixf commitcount 5000 replace into dftz
    db2 import to c:dftz.ixf of ixf commitcount 5000 create into dftz (仅IXF)
    db2 import to c:dftz.ixf of ixf commitcount 5000 replace_create into dftz (仅IXF)
    15.执行一个批处理文件
    db2 –tf 批处理文件名
    (文件中每一条命令用 ;结束)
    16.自动生成批处理文件
    建文本文件:temp.sql
    select ‘runstats on table DB2.’ || tabname || ‘ with distribution and detailed indexes all;’ from syscat.tables where tabschema=’DB2′ and type=’T';
    db2 –tf temp.sql>runstats.sql
    17.自动生成建表(视图)语句
    在服务器上:C:sqllibmisc目录中
    db2 connect to o_yd user db2 using pwd
    db2look –d o_yd –u db2 –e –p –c c:o_yd.txt
    18.其他命令
    grant dbadm on database to user bb
    19 select * from czyxx fetch first 1 rows only
    20 db2look –d ylbx –u db2admin –w –asd –a –e –o a.txt21. 显示当前用户所有表
    list tables
    22.列出所有的系统表
    list tables for system
    23.查看表结构
    db2 describe select * from user.tab
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  • 原文地址:https://www.cnblogs.com/juandx/p/4846740.html
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