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When you try to create a bufferpool or alter a bufferpool to a very large size and there is not enough memory in the system , DB2 may occupies all pagespace and overrall performance of the system become slow and may get hang at last because no pagespace is available. Then after you connect the database next time, DB2 will do crash recovery and still try to allocate memory for this big bufferpool and occupy all pagespace again. when you specify DB2_OVERRIDE_BPF parameter to override bufferpool size, it doesn't take effect in this situation. This is becasue DB2_OVERRIDE_BPF only applies for bufferpools that already exist at startup, and not to bufferpools that are created during crash recovery or roll forward. We will fix this problem and check DB2_OVERRIDE_BPF registry when creating bufferpools during crash recovery or roll forward. This problem only occurs in a 64 bit instance.

You can use db2iupdt -w 32 <INSTNAME> to update the instance to a 32 bit instance, then you can connect to the database succefully. After that, use db2iupdt -w 64 <INSTNAME> to update the instance to 64 bit again. Please take a backup at this point, so we don't have to roll forward through bufferpool creation that fails if we need restore and roll forward database.

Users Affected: All users using 64 bit instance Problem Description: When you try to create a bufferpool or alter a bufferpool to a very large size and there is not enough memory in the system , DB2 may occupies all pagespace and overrall performance of the system become slow and may get hang at last because no pagespace is available. Then after you connect the database at next time, DB2 will do crash recovery and still try to allocate memory for this big bufferpool and occupy all pagespace again. In this situation, when you specify DB2_OVERRIDE_BPF parameter to override bufferpool size, it doesn't take effect in this situation. This is becasue DB2_OVERRIDE_BPF only applies for bufferpools that already exist at startup, and not to bufferpools that are created during crash recovery or roll forward. We will fix this problem and check DB2_OVERRIDE_BPF registry when creating bufferpools during crash recovery or roll forward. This problem only occurs in 64 bit instance. Problem Summary: This problem is caused by a misoperation, when you create or alt er a bufferpool, the size is too large to allocated from OS and cause overrall performance of the system is very slow and seems hang. Another problem is that DB2_OVERRIDE_BPF registry only app lies to bufferpools that already exists, and not bufferpools wil l be created in crash recovery or roll forward. So DB2 will try to create this big bufferpool again when doing crash recovery or roll forward. We will fix this problem and check DB2_OVERRIDE_B PF registry in our crash recovery and roll forward code.

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DB2/SQL命令大全

2006-12-25 13:21

連接數據庫：

??connect?to?[數據庫名]?user?[操作用戶名]?using?[密碼]?

創建緩沖池(8K)：

??create?bufferpool?ibmdefault8k?IMMEDIATE??SIZE?5000?PAGESIZE?8?K?;
創建緩沖池(16K)(OA_DIVERTASKRECORD)：
??create?bufferpool?ibmdefault16k?IMMEDIATE??SIZE?5000?PAGESIZE?16?K?;
創建緩沖池(32K)(OA_TASK)：
??create?bufferpool?ibmdefault32k?IMMEDIATE??SIZE?5000?PAGESIZE?32?K?;

創建表空間：

??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;

創建系統表空間：

??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.?啟動實例(db2inst1):

db2start

2.?停止實例(db2inst1):

db2stop

3.?列出所有實例(db2inst1)

db2ilist

5.列出當前實例:

db2?get?instance

4.?察看示例配置文件:

db2?get?dbm?cfg|more

5.?更新數據庫管理器參數信息:

db2?update?dbm?cfg?using?para_name?para_value

6.?創建數據庫:

db2?create?db?test

7.?察看數據庫配置參數信息

db2?get?db?cfg?for?test|more

8.?更新數據庫參數配置信息

db2?update?db?cfg?for?test?using?para_name?para_value

10.刪除數據庫:

db2?drop?db?test

11.連接數據庫

db2?connect?to?test

12.列出所有表空間的詳細信息。

db2?list?tablespaces?show?detail

13.查詢數據:

db2?select?*?from?tb1

14.刪除數據:

db2?delete?from?tb1?where?id=1

15.創建索引:

db2?create?index?idx1?on?tb1(id);

16.創建視圖:

db2?create?view?view1?as?select?id?from?tb1

17.查詢視圖:

db2?select?*?from?view1

18.節點編目

db2?catalog?tcp?node?node_name?remote?server_ip?server?server_port

19.察看端口號

db2?get?dbm?cfg|grep?SVCENAME

20.測試節點的附接

db2?attach?to?node_name

21.察看本地節點

db2?list?node?direcotry

22.節點反編目

db2?uncatalog?node?node_name

23.數據庫編目

db2?catalog?db?db_name?as?db_alias?at?node?node_name

24.察看數據庫的編目

db2?list?db?directory

25.連接數據庫

db2?connect?to?db_alias?user?user_name?using?user_password

26.數據庫反編目

db2?uncatalog?db?db_alias

27.導出數據

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

28.導入數據

db2?import?from?myfile?of?ixf?messages?msg?replace?into?tb1

29.導出數據庫的所有表數據

db2move?test?export

30.生成數據庫的定義

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

31.創建數據庫

db2?create?db?test1

32.生成定義

db2?-tvf?db2look.sql

33.導入數據庫所有的數據

db2move?db_alias?import

34.重組檢查

db2?reorgchk

35.重組表tb1

db2?reorg?table?tb1

36.更新統計信息

db2?runstats?on?table?tb1

37.備份數據庫test

db2?backup?db?test

38.恢復數據庫test

db2?restore?db?test

399\.列出容器的信息

db2?list?tablespace?containers?for?tbs_id?show?detail

40.創建表:

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

41.列出所有表

db2?list?tables

42.插入數據:

db2?insert?into?tb1?values(1,’sam’);

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

.?建立數據庫DB2_GCB?

CREATE?DATABASE?DB2_GCB?ON?G:?ALIAS?DB2_GCB?

USING?CODESET?GBK?TERRITORY?CN?COLLATE?USING?SYSTEM?DFT_EXTENT_SZ?32?

2.?連接數據庫?

connect?to?sample1?user?db2admin?using?8301206?

3.?建立別名?

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.?插入記錄?

insert?into?zjt_tables?select?*?from?tables;?

insert?into?zjt_views?select?*?from?views;?

6.?建立視圖?

create?view?V_zjt_tables?as?select?tabschema,tabname?from?zjt_tables;?

7.?建立觸發器?

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?

[size=3]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?類型,LENGTH?as?長度?

from?columns?

where?tabname='ZJT_TABLES';?

11.?查看表結構?

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.?查看視圖?

select?viewname?from?views?

where?viewname='V_ZJT_TABLES';?

14.?查看索引?

select?indname?from?indexes?

where?indname='I_ZTABLES_TABNAME';?

15.?查看存貯過程?

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

FROM?SYSCAT.PROCEDURES;?

16.?類型轉換(cast)?

ip?datatype:varchar?

select?cast(ip?as?integer)+50?from?log_comm_failed?

17.?重新連接?

connect?reset?

18.?中斷數據庫連接?

disconnect?db2_gcb?

19.?view?application?

LIST?APPLICATION;?

20.?kill?application?

FORCE?APPLICATION(0);?

db2?force?applications?all?(強迫所有應用程序從數據庫斷開)?

21.?lock?table

lock?table?test?in?exclusive?mode?

22.?共享?

lock?table?test?in?share?mode?

23.?顯示當前用戶所有表?

list?tables?

24.?列出所有的系統表?

list?tables?for?system?

25.?顯示當前活動數據庫?

list?active?databases?

26.?查看命令選項?

list?command?options?

27.?系統數據庫目錄?

LIST?DATABASE?DIRECTORY?

28.?表空間?

list?tablespaces?

29.?表空間容器?

LIST?TABLESPACE?CONTAINERS?FOR?

Example:?LIST?TABLESPACE?CONTAINERS?FOR?1?

30.?顯示用戶數據庫的存取權限?

GET?AUTHORIZATIONS?

31.?啟動實例?

DB2START?

32.?停止實例?

db2stop?

33.?表或視圖特權?

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

grant?all?on?tables?to?user?WITH?GRANT?OPTION?

34.?程序包特權?

GRANT?EXECUTE?

ON?PACKAGE?PACKAGE-name?

TO?PUBLIC?

35.?模式特權?

GRANT?CREATEIN?ON?SCHEMA?SCHEMA-name?TO?USER?

36.?數據庫特權?

grant?connect,createtab,dbadm?on?database?to?user?

37.?索引特權?

grant?control?on?index?index-name?to?user?

38.?信息幫助?(??XXXnnnnn?)?

例:??SQL30081?

39.?SQL?幫助(說明?SQL?語句的語法)?

help?statement?

例如，help?SELECT?

40.?SQLSTATE?幫助(說明?SQL?的狀態和類別代碼)?

??sqlstate?或???class-code?

41.?更改與"管理服務器"相關的口令?

db2admin?setid?username?password?

42.?創建?SAMPLE?數據庫?

db2sampl?

db2sampl?F:(指定安裝盤)?

43.?使用操作系統命令?

!?dir?

44.?轉換數據類型?(cast)?

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

FROM?EMP_RESUME?

WHERE?RESUME_FORMAT?=?'ascii'?

45.?UDF

要運行?DB2?Java?存儲過程或?UDF，還需要更新服務器上的?DB2?數據庫管理程序配置，以包括在該機器上安裝?JDK?的路徑?

db2?update?dbm?cfg?using?JDK11_PATH?d:sqllibjavajdk?

TERMINATE?

update?dbm?cfg?using?SPM_NAME?sample?

46.?檢查?DB2?數據庫管理程序配置?

db2?get?dbm?cfg?

47.?檢索具有特權的所有授權名?

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))?

48.?修改表結構?

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');?

49.?業務類型說明?

insert?into?ywlbb?values?

('user01','業務申請'),?

('user02','業務撤消'),?

('user03','費用查詢'),?

('user04','費用自繳'),?

('user05','費用預存'),?

('user06','密碼修改'),?

('user07','發票打印'),?

('gl01','改用戶基本信息'),?

('gl02','更改支付信息'),?

('gl03','日統計功能'),?

('gl04','沖帳功能'),?

('gl05','對帳功能'),?

('gl06','計費功能'),?

('gl07','綜合統計')?

備份數據庫：
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;

以下是小弟在使用db2move中的一些經驗，希望對大家有所幫助。?

?db2???connect???to??YOURDB???
連接數據庫?

?db2look?-d??YOURDB??-a?-e?-x?-o?creatab.sql?
導出建庫表的SQL?

?db2move???YOURDB??export?
用db2move將數據備份出來?

?vi???creatab.sql?
如要導入的數據庫名與原數據庫不同，要修改creatab.sql中CONNECT?項?
如相同則不用更改?

?db2move??NEWDB??load?
將數據導入新庫中?

在導入中可能因為種種原因發生中斷，會使數據庫暫掛?
db2????list?tablespaces???show???detail?
如：?
??????詳細說明：?
?????裝入暫掛?
?總頁數??????????????????????????=?1652?
?可用頁數????????????????????????=?1652?
?已用頁數?????????????????????????=?1652?
?空閑頁數?????????????????????????=?不適用?
?高水位標記（頁）?????????????????=?不適用?
?頁大小（字節）???????????????????=?4096?
?盤區大小（頁）???????????????????=?32?
?預讀取大小（頁）?????????????????=?32?
?容器數???????????????????????????=?1?
?狀態更改表空間標識????????????????????=?2?
?狀態更改對象標識??????????????????????=?59?

?db2?select?tabname,tableid?from?syscat.tables?where?tableid=59?
查看是哪張表掛起?

表名知道后到db2move.lst(在db2move??YOURDB??export的目錄中)中找到相應的.ixf文件?
?db2?load?from?tab11.ixf?of?ixf?terminate?into?db2admin.xxxxxxxxx?
tab11.ixf對應的是xxxxxxxxx表?

數據庫會恢復正常，可再用db2?list?tablespaces?show?detail查看

30.不能通過GRANT授權的權限有哪種?

SYSAM

SYSCTRL

SYSMAINT

要更該述權限必須修改數據庫管理器配置參數

31.表的類型有哪些?

永久表(基表)

臨時表(說明表)

臨時表(派生表)

32.如何知道一個用戶有多少表?

SELECT*FROMSYSIBM.SYSTABLESWHERECREATOR='USER'

33.如何知道用戶下的函數?

select*fromIWH.USERFUNCTION

select*fromsysibm.SYSFUNCTIONS

34.如何知道用戶下的VIEW數?

select*fromsysibm.sysviewsWHERECREATOR='USER'

35.如何知道當前DB2的版本?

select*fromsysibm.sysvERSIONS

36.如何知道用戶下的TRIGGER數?

select*fromsysibm.SYSTRIGGERSWHERESCHEMA='USER'

37.如何知道TABLESPACE的狀況?

select*fromsysibm.SYSTABLESPACES

38.如何知道SEQUENCE的狀況?

select*fromsysibm.SYSSEQUENCES

39.如何知道SCHEMA的狀況?

select*fromsysibm.SYSSCHEMATA

40.如何知道INDEX的狀況?

select*fromsysibm.SYSINDEXES

41.如何知道表的字段的狀況?

select*fromsysibm.SYSCOLUMNSWHERETBNAME='AAAA'

42.如何知道DB2的數據類型?

select*fromsysibm.SYSDATATYPES

43.如何知道BUFFERPOOLS狀況?

select*fromsysibm.SYSBUFFERPOOLS

44.DB2表的字段的修改限制?

只能修改VARCHAR2類型的并且只能增加不能減少.

45.如何查看表的結構?

DESCRIBLETABLETABLE_NAME

DESCRIBLESELECT*FROMSCHEMA.TABLE_NAME

Change db2 password in db2 level

Using DB2 Configuration Assistance

Using DB2 CLP and CE

alter table xxx VOLATILE

Difference between Local and System Database Directory

Illustration of standard tables

Query the status for one specified tablespace?

Illustration of the DMS table-space address map

DB2 directories and files

Illustration of DB2 architechure and process

Tablespaces are put into backup pending after a load

Come pending when droping Procedures

Problem Description?

Check Process

Cause?

Solution?

More?

db2 can not create index on local view

set COMMIT mode in db2 clp

Reference

表與索引的重命名 RENAME

常用鏈接

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