export to tempfile of del select * from TABLENAME where not清理条件；

load from tempfile of del modified by delprioritychar replace into TABLENAME nonrecoverable；

调整数据库参数。%db2 connect to wisg

%db2 UPDATE DB CFG FOR wisg USING LOGBUFSZ        512日志缓冲区大小(4KB)%db2 UPDATE DB CFG FOR wisg USING LOCKLIST        512锁定列表的最大存储量(4KB)%db2 UPDATE DB CFG FOR wisg USING APP_CTL_HEAP_SZ 512最大应用程序控制堆大小(4KB)%db2 UPDATE DB CFG FOR wisg USING SORTHEAP        25000排序列表堆(4KB)%db2 UPDATE DB CFG FOR wisg USING MAXLOCKS        60每个应用程序的锁定百分比列表%db2 UPDATE DB CFG FOR wisg USING NUM_IOCLEANERS  4异步页清除程序的数目%db2 UPDATE DB CFG FOR wisg USING NUM_IOSERVERS   6  I/O服务器的数目%db2 UPDATE DB CFG FOR wisg USING logfilsiz       160000日志文件大小(4KB)%db2 UPDATE DB CFG FOR wisg USING LOGPRIMARY      3主日志文件的数目%db2 UPDATE DB CFG FOR wisg USING LOCKTIMEOUT      60锁的超时时间%db2 UPDATE DBM CFG USING HEALTH_MON off关闭健康监控中心%db2 UPDATE DBM CFG USING START_STOP_TIME 3启动停止超时时间%db2 terminate

79. db2创建用户1.在系统中创建一个用户2.用db2inst1链接数据:db2 connect to das

3.给新用户赋权限:db2 grant connect on database to user XXX

80.启动数据库监听db2set DB2COMM=tcpip

db2stop force

db2start

db2优化：以db2inst1用户登录，调整实例参数，并测试启动是否成功。#su - db2inst1

%db2start

%db2 UPDATE DBM CFG USING SHEAPTHRES 125000共享排序的排序堆域值(4KB)%db2set DB2_PARALLEL_IO=*所有表空间将使用每个容器主轴数等于6的缺省值。预取大小比启用并行I/O时大6倍。所有表空间均会启用并行I/O。预取请求分解成多个较小请求，每个请求等于预取大小除以扩展数据块大小后的值(或等于容器数乘以主轴数)。%db2set DB2_SKIPINSERTED=on

%db2set DB2_EVALUNCOMMITTED=on为了提高并发性，DB2(R)现在允许在某些情况下对CS或RS隔离扫描延迟行锁定，直到知道一条记录满足查询的谓词为止。缺省情况下，当在表扫描或索引扫描期间执行行锁定时，DB2会先锁定已扫描的每一行然后再确定该行是否符合查询要求。为了提高扫描的并发性，可以延迟行锁定，直到确定某行符合查询要求为止。要利用此功能，应启用DB2_EVALUNCOMMITTED注册表变量。%db2set DB2_SKIPDELETED=on如果启用了DB2_SKIPDELETED注册表变量，则DB2在类型2索引扫描中将跳过已删除的键。%db2stop

77.数据库调优db2untag -f /dev/raw/raw1

db2untag -f /dev/raw/raw2

db2untag -f /dev/raw/raw3

db2untag -f /dev/raw/raw4

db2 update db cfg using newlogpath /dev/raw/raw4

db2 update db cfg using logfilsiz 20480

db2 update db cfg using logprimary 15

db2 update db cfg using logsecond 5

db2 update db cfg using PCKCACHESZ 51200堆中没有足够的存储器可用来处理语句:db2 update db cfg using APP_CTL_HEAP_SZ 1000

statement is too long or too complex:db2 update db cfg using STMTHEAP 4096

db2 alter bufferpool ibmdefaultbp size 102400

78.创建裸设备#fdisk –l

#fdisk /dev/sdb其中/dev/sdb为阵列的一个盘输入“n”创建新分区输入“p”创建主分区。输入“1”，指定分区号为1选择默认值1，按键盘上的“Enter”键选择默认值51200，按键盘上的“Enter”键输入“p”查看分区信息输入“t”改变分区ID输入“1”指定分区号为1。输入“8e”指定ID为8e，8e为LVM类型分区输入“p”查看分区信息输入“w”，上述设置生效并退出创建物理卷#pvcreate -ff /dev/sdb1创建逻辑卷组#vgcreate -s 64M -v db2dg /dev/sdb1创建逻辑卷#lvcreate -l 160 –n  db2vol01 db2dg

#lvcreate -L 5120M -n db2vol02 db2dg

#lvcreate -L 5120M -n db2vol03 db2dg查看创建的卷组和逻辑卷。#vgdisplay –v创建文件系统。#mkfs -t ext3 /dev/db2dg/db2vol01挂载文件系统。#mkdir /db2vol01

#mount /dev/db2dg/db2vol01 /db2vol01

#chown –R db2inst1:db2grp1 /db2vol01挂载文件系统。#mkdir /db2vol01

#mount /dev/db2dg/db2vol01 /db2vol01

#chown –R db2inst1:db2grp1 /db2vol01关于目录/home/db2inst1，具体的操作如下：#cd /home/db2inst1

#tar cvf /home/db2.tar .*

#cd /opt/IBM/db2/V8.1/instance

#./db2idrop db2inst1

#mount /dev/db2dg/db2vol10 /home/db2inst1

#cd /home/db2inst1

#tar xvf /home/db2.tar

#chown –R db2inst1:db2grp1 /home/db2inst1把逻辑卷链接到裸设备上。#raw /dev/raw/raw1 /dev/db2dg/db2vol02

#raw /dev/raw/raw2 /dev/db2dg/db2vol03

#raw /dev/raw/raw3 /dev/db2dg/db2vol04

#raw /dev/raw/raw4 /dev/db2dg/db2vol05改变裸设备的属组。#chown -R db2inst1:db2grp1 /dev/raw/raw1

#chown -R db2inst1:db2grp1 /dev/raw/raw2

#chown -R db2inst1:db2grp1 /dev/raw/raw3

#chown -R db2inst1:db2grp1 /dev/raw/raw4

73.检索具有特权的所有授权名SELECT DISTINCT GRANTEE, GRANTEETYPE, 'DATABASE' FROM SYSCAT.DBAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'TABLE ' FROM SYSCAT.TABAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'PACKAGE ' FROM SYSCAT.PACKAGEAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'INDEX ' FROM SYSCAT.INDEXAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'COLUMN ' FROM SYSCAT.COLAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'SCHEMA ' FROM SYSCAT.SCHEMAAUTH UNION

SELECT DISTINCT GRANTEE, GRANTEETYPE, 'SERVER ' FROM SYSCAT.PASSTHRUAUTH

ORDER BY GRANTEE, GRANTEETYPE, 3

74.修改表结构alter table yhdab ALTER kh SET DATA TYPE varchar(13);

alter table lst_bsi alter bsi_money set data type int;

75.备份数据库：CONNECT TO EXOA;

QUIESCE DATABASE IMMEDIATE FORCE CONNECTIONS;

CONNECT RESET;

BACKUP DATABASE EXOA TO "/home/exoa2/db2bak/" WITH 2 BUFFERS BUFFER 1024 PARALLELISM 1 WITHOUT PROMPTING;

CONNECT TO EXOA;

UNQUIESCE DATABASE;

CONNECT RESET;

76.查看是哪张表挂起:db2 select tabname,tableid from syscat.tables where tableid=59表名知道后到db2move.lst(在db2move  YOURDB  export的目录中)中找到相应的.ixf文件db2 load from tab11.ixf of ixf terminate into db2admin.xxxxxxxxx

tab11.ixf对应的是xxxxxxxxx表

51. view application：LIST APPLICATION;

52. kill application：FORCE APPLICATION(0);

db2 force applications all (强迫所有应用程序从数据库断开)

53. lock table：lock table test in exclusive mode

54.共享：lock table test in share mode

55.列出所有的系统表：list tables for system

56.显示当前活动数据库：list active databases

57.查看命令选项：list command options

58.表空间：list tablespaces

59.表空间容器：LIST TABLESPACE CONTAINERS FOR；Example: LIST TABLESPACE CONTAINERS FOR 1

60.显示用户数据库的存取权限：GET AUTHORIZATIONS

61.表或视图特权:grant select,delete,insert,update on tables to user

grant all on tables to user WITH GRANT OPTION

62.程序包特权:GRANT EXECUTE ON PACKAGE PACKAGE-name TO PUBLIC

63.模式特权:GRANT CREATEIN ON SCHEMA SCHEMA-name TO USER

64.数据库特权:grant connect,createtab,dbadm on database to user

65.索引特权:grant control on index index-name to user

66.信息帮助(? XXXnnnnn):例:? SQL30081

67. SQL帮助(说明SQL语句的语法):help statement

68. SQLSTATE帮助(说明SQL的状态和类别代码):? sqlstate或? class-code

69.更改与"管理服务器"相关的口令:db2admin setid username password

70.使用操作系统命令:! dir

71.转换数据类型(cast)

SELECT EMPNO, CAST(RESUME AS VARCHAR(370)) FROM EMP_RESUME WHERE RESUME_FORMAT = 'ascii'

72. UDF:要运行DB2 Java存储过程或UDF，还需要更新服务器上的DB2数据库管理程序配置，以包括在该机器上安装JDK的路径db2 update dbm cfg using JDK11_PATH d:sqllibjavajdk

TERMINATE

update dbm cfg using SPM_NAME sample

31.重组检查：db2 reorgchk

32.重组表tb1：db2 reorg table tb1

33.更新统计信息：db2 runstats on table tb1

34.备份数据库test：db2 backup db test

35.恢复数据库test：db2 restore db test

36.列出容器的信息：db2 list tablespace containers for tbs_id show detail

37.列出所有表：db2 list tables

38.建立别名create alias db2admin.tables for sysstat.tables;

CREATE ALIAS DB2ADMIN.VIEWS FOR SYSCAT.VIEWS

create alias db2admin.columns for syscat.columns;

create alias guest.columns for syscat.columns;

39.建立触发器CREATE TRIGGER zjt_tables_del

AFTER DELETE ON zjt_tables

REFERENCING OLD AS O

FOR EACH ROW MODE DB2SQL

40.建立唯一性索引：CREATE UNIQUE INDEX I_ztables_tabname ON zjt_tables(tabname);

41.查看表：select tabname from tables where tabname='ZJT_TABLES';

42.查看列：select SUBSTR(COLNAME,1,20) as列名,TYPENAME as类型,LENGTH as长度from columns where tabname='ZJT_TABLES';

43.查看表结构：db2 describe table user1.department；db2 describe select * from user.tables

44.查看表的索引：db2 describe indexes for table user1.department

45.查看视图：select viewname from views where viewname='V_ZJT_TABLES';

46.查看索引：select indname from indexes where indname='I_ZTABLES_TABNAME';

47.查看存贮过程：SELECT SUBSTR(PROCSCHEMA,1,15),SUBSTR(PROCNAME,1,15) FROM SYSCAT.PROCEDURES;

48.类型转换(cast)

ip datatype:varchar

select cast(ip as integer)+50 from log_comm_failed

49.重新连接：connect reset

50.中断数据库连接：disconnect db2_gcb

1.启动实例(db2inst1):db2start

2.停止实例(db2inst1):db2stop

3.列出所有实例(db2inst1)：db2ilist

4.列出当前实例:db2 get instance

5.察看示例配置文件:db2 get dbm cfg|more

6.更新数据库管理器参数信息:db2 update dbm cfg using para_name para_value

7.察看数据库配置参数信息：db2 get db cfg for test|more

8.更新数据库参数配置信息：db2 update db cfg for test using para_name para_value

9.删除数据库:db2 drop db test

10.连接数据库：db2 connect to test

11.列出所有表空间的详细信息：db2 list tablespaces show detail

12.创建索引:db2 create index idx1 on tb1(id);

13.创建视图:db2 create view view1 as select id from tb1

14.查询视图:db2 select * from view1

15.节点编目：db2 catalog tcp node node_name remote server_ip server server_port

16.察看端口号：db2 get dbm cfg|grep SVCENAME

17.测试节点的附接：db2 attach to node_name

18.察看本地节点：db2 list node direcotry

19.节点反编目：db2 uncatalog node node_name

20.数据库编目：db2 catalog db db_name as db_alias at node node_name

21.察看数据库的编目：db2 list db directory

22.连接数据库：db2 connect to db_alias user user_name using user_password

23.数据库反编目：db2 uncatalog db db_alias

24.导出数据：db2 export to myfile of ixf messages msg select * from tb1

25.导入数据：db2 import from myfile of ixf messages msg replace into tb1

26.导出数据库的所有表数据：db2move test export

27.生成数据库的定义：db2look -d db_alias -a -e -m -l -x -f -o db2look.sql

28.生成定义：db2 -tvf db2look.sql

29.加载脚本: db2 –td@ -vf filename，其中@为命令行的分隔符30.导入数据库所有的数据：db2move db_alias import

创建数据库在文件上创建数据库：CREATE DATABASE das USING CODESET 'UTF-8' TERRITORY 'CN' CATALOG TABLESPACE MANAGED BY DATABASE USING (file 'd:\db2data\dascat.dat' 102400) EXTENTSIZE 16 PREFETCHSIZE 32 USER TABLESPACE MANAGED BY DATABASE USING (file 'd:\db2data\dasusr.dat' 102400) EXTENTSIZE 256 PREFETCHSIZE 64 TEMPORARY TABLESPACE MANAGED BY DATABASE USING (file 'd:\db2data\dastmp.dat' 102400) EXTENTSIZE 256 WITH "DAS DB"在裸设备上创建数据库CREATE DATABASE das212 CATALOG TABLESPACE MANAGED BY DATABASE USING (device '/dev/db2dg/lv_dat01' 10240000) EXTENTSIZE 16 PREFETCHSIZE 32 USER TABLESPACE MANAGED BY DATABASE USING (device '/dev/db2dg/lv_dat02' 10240000) EXTENTSIZE 256 PREFETCHSIZE 64 TEMPORARY TABLESPACE MANAGED BY DATABASE USING (device '/dev/db2dg/lv_dat03' 10240000) EXTENTSIZE 256 WITH "DAS DB"

GRANT USE OF TABLESPACE exoatbs TO PUBLIC;

GRANT USE OF TABLESPACE exoatbs16k TO PUBLIC;

GRANT USE OF TABLESPACE exoatbs32k TO PUBLIC;创建系统表空间：CREATE TEMPORARY TABLESPACE exoasystmp IN DATABASE PARTITION GROUP IBMTEMPGROUP PAGESIZE 8K  MANAGED BY SYSTEM USING ('/home/exoa2/exoasystmp'   ) EXTENTSIZE 32 PREFETCHSIZE 16 BUFFERPOOL IBMDEFAULT8K  OVERHEAD 24.10 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

CREATE TEMPORARY TABLESPACE exoasystmp16k IN DATABASE PARTITION GROUP IBMTEMPGROUP PAGESIZE 16K MANAGED BY SYSTEM USING ('/home/exoa2/exoasystmp16k'  ) EXTENTSIZE 32 PREFETCHSIZE 16 BUFFERPOOL IBMDEFAULT16K OVERHEAD 24.10 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

CREATE TEMPORARY TABLESPACE exoasystmp32k IN DATABASE PARTITION GROUP IBMTEMPGROUP PAGESIZE 32K MANAGED BY SYSTEM USING ('/home/exoa2/exoasystmp32k') EXTENTSIZE 32 PREFETCHSIZE 16 BUFFERPOOL IBMDEFAULT32K OVERHEAD 24.10 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

创建缓冲池(8K)：create bufferpool ibmdefault8k IMMEDIATE  SIZE 5000 PAGESIZE 8 K ;创建缓冲池(16K)(OA_DIVERTASKRECORD)：create bufferpool ibmdefault16k IMMEDIATE  SIZE 5000 PAGESIZE 16 K ;创建缓冲池(32K)(OA_TASK)：create bufferpool ibmdefault32k IMMEDIATE  SIZE 5000 PAGESIZE 32 K ;创建表空间：CREATE TABLESPACE exoatbs IN DATABASE PARTITION GROUP IBMDEFAULTGROUP PAGESIZE 8K MANAGED BY SYSTEM USING ('/home/exoa2/exoacontainer') EXTENTSIZE 32 PREFETCHSIZE 16  BUFFERPOOL IBMDEFAULT8K  OVERHEAD 24.10 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

CREATE TABLESPACE exoatbs16k  IN DATABASE PARTITION GROUP IBMDEFAULTGROUP PAGESIZE 16K MANAGED BY SYSTEM USING ('/home/exoa2/exoacontainer16k'   ) EXTENTSIZE 32  PREFETCHSIZE 16  BUFFERPOOL IBMDEFAULT16K  OVERHEAD 24.1 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

CREATE TABLESPACE exoatbs32k  IN DATABASE PARTITION GROUP IBMDEFAULTGROUP PAGESIZE 32K MANAGED BY SYSTEM USING ('/home/exoa2/exoacontainer32k'   ) EXTENTSIZE 32  PREFETCHSIZE 16  BUFFERPOOL IBMDEFAULT32K  OVERHEAD 24.1 TRANSFERRATE 0.90  DROPPED TABLE RECOVERY OFF;

说明：在不相关的数据表export数据时，可以采取并发的形式，以提高效率；TABLENAME指待清理table的名称；modified by delprioritychar防止数据库记录中存在换行符,导致数据无法装入的情况;

replace into对现数据库中的内容进行替换，即将现行的数据记录清理，替换为数据文件内容；nonrecoverable无日志方式装入；connect to [数据库名] user [操作用户名] using [密码]

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2010-06-20 14:44

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分类:数据库

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