DB2数据库基础入门

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IBM DB2数据库基础

基本命令集合

1. 建立数据库DB2_GCB

CREATE DATABASE DB2_GCB ON G: ALIAS DB2_GCB

USING CODESET GBK TERRITORY CN COLLATE USING SYSTEM DFT_EXTENT_SZ 32

2. 连接数据库

connect to sample1 user db2admin using 8301206 3. 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; 4. 建立表

create table zjt_tables as

(select * from tables) definition only; create table zjt_views as

(select * from views) definition only; 5. 插入记录

insert into zjt_tables select * from tables; insert into zjt_views select * from views;

6. 建立视图

create view V_zjt_tables as select tabschema,tabname from zjt_tables; 7. 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)) 8. 建立唯一性索引

CREATE UNIQUE INDEX I_ztables_tabname ON zjt_tables(tabname); 9. 查看表

select tabname from tables where tabname='ZJT_TABLES'; 10. 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'; 11. 查看表结构

db2 describe table user1.department db2 describe select * from user.tables

12. 查看表的索引

db2 describe indexes for table user1.department 13. 查看视图

select viewname from views where viewname='V_ZJT_TABLES'; 14. 查看索引

select indname from indexes where indname='I_ZTABLES_TABNAME'; 15. 查看存贮过程

SELECT SUBSTR(PROCSCHEMA,1,15),SUBSTR(PROCNAME,1,15) FROM SYSCAT.PROCEDURES; 16. 类型转换(cast) ip datatype:varchar

select cast(ip as integer)+50 from log_comm_failed 17. 重新连接 connect reset 18. 中断数据库连接 disconnect db2_gcb 19. view application LIST APPLICATION; 20. kill application FORCE APPLICATION(0);

db2 force applications all (强迫所有应用程序从数据库断开) 21. lock table

lock table test in exclusive mode 22. 共享[锁]

lock table test in share mode 23. 显示当前用户所有表 list tables 24. 列出所有的系统表 list tables for system 25. 显示当前活动数据库 list active databases 26. 查看命令选项 list command options 27. 系统数据库目录 LIST DATABASE DIRECTORY 28. 表空间 list tablespaces 29. 表空间容器

LIST TABLESPACE CONTAINERS FOR Example : LIST TABLESPACE CONTAINERS FOR 1

30. 显示用户数据库的存取权限 GET AUTHORIZATIONS 31. 启动实例 DB2START 32. 停止实例 db2stop 33. 表或视图特权

grant select,delete,insert,update on tables to user grant all on tables to user WITH GRANT OPTION 34. 程序包特权 GRANT EXECUTE

ON PACKAGE PACKAGE-name TO PUBLIC 35. 模式特权

GRANT CREATEIN ON SCHEMA SCHEMA-name TO USER 36. 数据库特权

grant connect,createtab,dbadm on database to user 37. 索引特权

grant control on index index-name to user 38. 信息帮助 (? XXXnnnnn ) 例:? SQL30081

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