db2常用命令

连接数据库：

    connect to [数据库名] user [操作用户名] using [密码]

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;

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;

1. 启动实例(db2inst1):
db2start

2. 停止实例(db2inst1):

db2stop

3. 列出所有实例(db2inst1)

db2ilist

5.列出当前实例:

db2 get instance

4. 察看示例配置文件:

db2 get dbm cfg|more

5. 更新数据库管理器参数信息:

db2 update dbm cfg using para_name para_value

6. 创建数据库:

db2 create db test

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

10.删除数据库:

db2 drop db test

11.连接数据库

db2 connect to test

12.列出所有表空间的详细信息。

db2 list tablespaces show detail

13.查询数据:

db2 select * from tb1

14.删除数据:

db2 delete from tb1 where id=1

15.创建索引:

db2 create index idx1 on tb1(id);

16.创建视图:

db2 create view view1 as select id from tb1

17.查询视图:

db2 select * from view1

18.节点编目

db2 catalog tcp node node_name remote server_ip server server_port

19.察看端口号

db2 get dbm cfg|grep SVCENAME

20.测试节点的附接

db2 attach to node_name

21.察看本地节点

db2 list node direcotry

22.节点反编目

db2 uncatalog node node_name

23.数据库编目

db2 catalog db db_name as db_alias at node node_name

24.察看数据库的编目

db2 list db directory

25.连接数据库

db2 connect to db_alias user user_name using user_password

26.数据库反编目

db2 uncatalog db db_alias

27.导出数据

db2 export to myfile of ixf messages msg select * from tb1

28.导入数据

db2 import from myfile of ixf messages msg replace into tb1

29.导出数据库的所有表数据

db2move test export

30.生成数据库的定义

db2look -d db_alias -a -e -m -l -x -f -o db2look.sql


32.生成定义

db2 -tvf db2look.sql

33.导入数据库所有的数据

db2move db_alias import

34.重组检查

db2 reorgchk

35.重组表tb1

db2 reorg table tb1

36.更新统计信息

db2 runstats on table tb1

37.备份数据库test

db2 backup db test

38.恢复数据库test

db2 restore db test

39.列出容器的信息

db2 list tablespace containers for tbs_id show detail

40.创建表:

db2 ceate table tb1(id integer not null,name char(10))

41.列出所有表

db2 list tables

42.插入数据:

db2 insert into tb1 values(1,’sam’);

db2 insert into tb2 values(2,’smitty’);


43 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;

44. 建立表

create table zjt_tables as

(select * from tables) definition only;

create table zjt_views as

(select * from views) definition only;

45. 插入记录

insert into zjt_tables select * from tables;

insert into zjt_views select * from views;

46. 建立视图

create view V_zjt_tables as select tabschema,tabname from zjt_tables;

47. 建立触发器

CREATE TRIGGER zjt_tables_del

AFTER DELETE ON zjt_tables

REFERENCING OLD AS O

FOR EACH ROW MODE DB2SQL

Insert into zjt_tables1 values(substr(o.tabschema,1,8),substr(o.tabname,1,10))

48. 建立唯一性索引

CREATE UNIQUE INDEX I_ztables_tabname

[size=3]ON zjt_tables(tabname);

49. 查看表

select tabname from tables

where tabname='ZJT_TABLES';

50. 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';

51. 查看表结构

db2 describe table user1.department

db2 describe select * from user.tables

52. 查看表的索引

db2 describe indexes for table user1.department

53. 查看视图

select viewname from views

where viewname='V_ZJT_TABLES';

54. 查看索引

select indname from indexes

where indname='I_ZTABLES_TABNAME';

55. 查看存贮过程

SELECT SUBSTR(PROCSCHEMA,1,15),SUBSTR(PROCNAME,1,15)

FROM SYSCAT.PROCEDURES;

56. 类型转换(cast)

ip datatype:varchar

select cast(ip as integer)+50 from log_comm_failed

57. 重新连接

connect reset

58. 中断数据库连接

disconnect db2_gcb

59. view application

LIST APPLICATION;

60. kill application

FORCE APPLICATION(0);

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

61. lock table

lock table test in exclusive mode

62. lock table 共享

lock table test in share mode

63. 显示当前用户所有表

list tables

64. 列出所有的系统表

list tables for system

65. 显示当前活动数据库

list active databases

66. 查看命令选项

list command options

67. 系统数据库目录

LIST DATABASE DIRECTORY

68. 表空间

list tablespaces

69. 表空间容器

LIST TABLESPACE CONTAINERS FOR

Example: LIST TABLESPACE CONTAINERS FOR 1

70. 显示用户数据库的存取权限

GET AUTHORIZATIONS



71. 表或视图特权

grant select,delete,insert,update on tables to user

grant all on tables to user WITH GRANT OPTION

72. 程序包特权

GRANT EXECUTE

ON PACKAGE PACKAGE-name

TO PUBLIC

73. 模式特权

GRANT CREATEIN ON SCHEMA SCHEMA-name TO USER

74. 数据库特权

grant connect,createtab,dbadm on database to user

75. 索引特权

grant control on index index-name to user

76. 信息帮助 (? XXXnnnnn )

例:? SQL30081

77. SQL 帮助(说明 SQL 语句的语法)

help statement

例如，help SELECT

80. SQLSTATE 帮助(说明 SQL 的状态和类别代码)

? sqlstate 或 ? class-code

81. 更改与"管理服务器"相关的口令

db2admin setid username password

82. 创建 SAMPLE 数据库

db2sampl

db2sampl F:(指定安装盘)

83. 使用操作系统命令

! dir

84. 转换数据类型 (cast)

SELECT EMPNO, CAST(RESUME AS VARCHAR(370))

FROM EMP_RESUME

WHERE RESUME_FORMAT = 'ascii'

85. 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

86. 检查 DB2 数据库管理程序配置

db2 get dbm cfg

87. 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

create table yhdab

(id varchar(10),

password varchar(10),

ywlx varchar(10),

kh varchar(10));

create table ywlbb

(ywlbbh varchar(8),

ywmc varchar(60))

88. 修改表结构

alter table yhdab ALTER kh SET DATA TYPE varchar(13);

alter table yhdab ALTER ID SET DATA TYPE varchar(13);

alter table lst_bsi alter bsi_money set data type int;

insert into yhdab values

('20000300001','123456','user01','20000300001'),

('20000300002','123456','user02','20000300002');


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;


88.不能通过GRANT授权的权限有哪种?

SYSAM

SYSCTRL

SYSMAINT

要更该述权限必须修改数据库管理器配置参数

89.表的类型有哪些?

永久表(基表)

临时表(说明表)

临时表(派生表)

90.如何知道一个用户有多少表?

SELECT*FROMSYSIBM.SYSTABLESWHERECREATOR='USER'

91.如何知道用户下的函数?

select* from IWH.USERFUNCTION

select*from sysibm.SYSFUNCTIONS

92.如何知道用户下的VIEW数?

select*from sysibm.sysviewsWHERECREATOR='USER'

93.如何知道当前DB2的版本?

select*from sysibm.sysvERSIONS

94.如何知道用户下的TRIGGER数?

select*from sysibm.SYSTRIGGERSWHERESCHEMA='USER'

95.如何知道TABLESPACE的状况?

select* from sysibm.SYSTABLESPACES

96.如何知道SEQUENCE的状况?

select*from sysibm.SYSSEQUENCES

97.如何知道SCHEMA的状况?

select*fromsysibm.SYSSCHEMATA

98.如何知道INDEX的状况?

select*fromsysibm.SYSINDEXES

99.如何知道表的字段的状况?

select*fromsysibm.SYSCOLUMNSWHERETBNAME='AAAA'

100.如何知道DB2的数据类型?

select*fromsysibm.SYSDATATYPES

101.如何知道BUFFERPOOLS状况?

select*fromsysibm.SYSBUFFERPOOLS

102.DB2表的字段的修改限制?

只能修改VARCHAR2类型的并且只能增加不能减少.

103.如何查看表的结构?

DESCRIBLETABLETABLE_NAME

OR

DESCRIBLESELECT*FROMSCHEMA.TABLE_NAME