DB2相关数据库命令
1.数据库实例的启动
首先要启动数据库的实例，即切换到db2inst1用户(注:db2inst1用户为当前数据库的实例)，然后执行db2start启动数据库的实例
[root@localhost instance]# su - db2inst1
[db2inst1@localhost ~]$ db2start
SQL1063N  DB2START processing was successful.
[db2inst1@localhost ~]$
2.数据库实例的关闭
首先在db2inst1用户下强制关闭实例上的所有应用程序，然后再关闭数据库实例
[db2inst1@localhost ~]$ db2 force application all
DB20000I  The FORCE APPLICATION command completed successfully.
DB21024I  This command is asynchronous and may not be effective immediately.
[db2inst1@localhost ~]$ db2stop
SQL1064N  DB2STOP processing was successful.
[db2inst1@localhost ~]$
强制停止
[db2inst1@localhost DB2]$ db2stop force
SQL1064N  DB2STOP processing was successful.
[db2inst1@localhost DB2]$
3.显示所有的实例
[db2inst1@localhost ~]$ db2ilist
db2inst1
[db2inst1@localhost ~]$
4.显示当前的实例
[db2inst1@localhost ~]$ db2 get instance
The current database manager instance is:  db2inst1
[db2inst1@localhost ~]$
5.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.
[root@localhost instance]#
6.列出当前实例中有哪些数据库
[root@localhost instance]# su - db2inst1
[db2inst1@localhost ~]$ db2 list db directory
SQL1031N  The database directory cannot be found on the indicated file system.
SQLSTATE=58031
[db2inst1@localhost ~]$
注：上面信息说明实例中没有数据库
7.创建数据库
[root@localhost instance]# su - db2inst1
[db2inst1@localhost ~]$ db2 create database test
SQL1032N  No start database manager command was issued.  SQLSTATE=57019
[db2inst1@localhost ~]$
[db2inst1@localhost ~]$ db2start
SQL5043N  Support for one or more communications protocols failed to start successfully. However, core database manager functionality started successfully.
[db2inst1@localhost ~]$ db2 create database test
DB20000I  The CREATE DATABASE command completed successfully.
[db2inst1@localhost ~]$ db2 list db directory
System Database Directory
Number of entries in the directory = 1
Database 1 entry:
Database alias                      = TEST
Database name                        = TEST
Local database directory            = /home/db2inst1
Database release level              = d.00
Comment                              =
Directory entry type                = Indirect
Catalog database partition number    = 0
Alternate server hostname            =
Alternate server port number        =
[db2inst1@localhost ~]$
注：上面通过创建一个test的数据库，并说明了创建数据库时，要先启动数据库，然后创建数据库tes
t成功后并列出了当前实例中的所有数据库，只存在数据库test
8.连接数据库
[db2inst1@localhost ~]$ db2 connect to test
Database Connection Information
Database server        = DB2/LINUX 9.7.1
SQL authorization ID  = DB2INST1
Local database alias  = TEST
[db2inst1@localhost ~]$
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>
9.查看表的空间
[db2inst1@localhost ~]$ db2 list tablespaces [ show detail ]
Tablespaces for Current Database
Tablespace ID                        = 0
Name                                = SYSCATSPACE
Type                                = Database managed space
Contents                            = All permanent data. Regular table space.linux安装数据库
State                                = 0x0000
Detailed explanation:
Normal
Tablespace ID                        = 1
Name                                = TEMPSPACE1
Type                                = System managed space
Contents                            = System Temporary data
State                                = 0x0000
Detailed explanation:
Normal
Tablespace ID                        = 2
Name                                = USERSPACE1
Type                                = Database managed space
Contents                            = All permanent data. Large table space.
State                                = 0x0000
Detailed explanation:
Normal
[db2inst1@localhost ~]$
注: show detail为可选项，显示更详细信息
或者 db2pd -tablespaces -db 数据库名
[db2inst1@localhost ~]$ db2pd -tablespaces -db test
Database Partition 0 -- Database TEST -- Active -- Up 0 days 00:03:11
Tablespace Configuration:
Address    Id    Type Content PageSz ExtentSz Auto Prefetch BufID BufIDDisk FSC NumCntrs MaxStripe  LastConsecPg Name
0x9DC2A060 0    DMS  Regular 4096  4        Yes  4        1    1        Off 1        0          3            SYSCATSPACE
0x9DC2B4B0 1    SMS  SysTmp  4096  32      Yes  32      1    1        On  1        0          31          TEMPSPACE1
0x9DC30940 2    DMS  Large  4096  32      Yes  32      1    1        Off 1        0          31          USERSPACE1
Tablespace Statistics:
Address    Id    TotalPgs  UsablePgs  UsedPgs    PndFreePgs FreePgs    HWM        Max HWM    State      MinRecTime NQuiescers PathsDropped
0x9DC2A060 0    24576      24572      18712      0          5860      18712      18712      0x00000000 0          0          No       
0x9DC2B4B0 1    1          1          1          0          0          0          0          0x00000000 0          0          No       
0x9DC30940 2    8192      8160      96        0          8064      96        96        0x00000000 0          0          No       
Tablespace Autoresize Statistics:
Address
Id    AS  AR  InitSize    IncSize    IIP MaxSize    LastResize                LRF
0x9DC2A060 0    Yes Yes 33554432    -1          No  None        None                      No
0x9DC2B4B0 1    Yes No  0          0          No  0                    None                      No
0x9DC30940 2    Yes Yes 33554432    -1          No  None        None                      No
Containers:
Address    TspId ContainNum Type    TotalPgs  UseablePgs PathID    StripeSet  Container
0x9B218F00 0    0          File    24576      24572      0          0          /home/db2inst1/db2inst1/NODE0000/TEST/T0000000/C0000000.CAT
0x9B219120 1    0          Path    1          1          0          0          /home/db2inst1/db2inst1/NODE0000/TEST/T0000001/C0000000.TMP
0x9B219390 2    0          File    8192      8160      0          0          /home/db2inst1/db2inst1/NODE0000/TEST/T0000002/C0000000.LRG
[db2inst1@localhost ~]$
10.显示数据库里有哪些表
[db2inst1@localhost ~]$ db2 connect to test
Database Connection Information
Database server        = DB2/LINUX 9.7.1
SQL authorization ID  = DB2INST1
Local database alias  = TEST
[db2inst1@localhost ~]$  db2 list tables
Table/View                      Schema          Type  Creation time           
------------------------------- --------------- ----- --------------------------
0 record(s) selected.
[db2inst1@localhost ~]$
注：上面信息说明数据库test中还没有表

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。