DB2 创建数据库及数据库用户命令行示例
日常开发工作中，搭建个数据库测试环境的操作虽然很少，但是能掌握高效快捷的搭建过程定会让工作简单不少。
描述一下数据库搭建的基本要求：
数据库应用用户
| 用户名 | UID | 组名 | GID | 家目录 | 说明 |
| evcz | 1008 | users | 100 | /home/evcz | 应用管理用户 |
数据库创建要求
简单起见，数据文件大小统一设为1GB。
| evczdb | syscatspace | 0 | /db2ffcsdata1/evczdb/syscatspace_c1 | 8k |
| tempspace1 | 1 | /db2ffcstmptbs/evczdb/tempspace1 | 8k | |
| userspace1 | 2 | /db2ffcsdata1/evczdb/userspace1_c1 | 8k | |
| assp | 3 | /db2ffcsdata1/evczdb/asspspace_c1 | 8k | |
| assp_index | 4 | /db2ffcsdata1/evczdb/idxspace_c1 | 8k | |
| assp_clob | 5 | /db2ffcsdata1/evczdb/clobspace_c1 | 32k |
| IBMDEFAULTBP | 1 | 所有表空间 | 8k | |
| buffer_assp8k() | 2 | assp | 8k | |
| buffer_idx8k() | 3 | assp_index | 8k | |
| buffer_clob32k() | 4 | assp_clob | 32k | |
下面是创建符合上述要求的数据库的基本操作：
1. 创建操作系统用户及相关的目录
useradd -u 1008 -g users -d /home/evcz evcz
mkdir -pv /db2ffcsdata1/evczdb/
mkdir -pv /db2ffcstmptbs/evczdb/
chown db2iffcs.db2igfcs -R /db2ffcsdata1/evczdb/
chown db2iffcs.db2igfcs -R /db2ffcstmptbs/evczdb/简单说明一下，当前DB2实例用户是db2iffcs
采用脚本方式创建，原因是命令太长，编辑不方便。
[db2iffcs@h15693 ~]$ cat /tmp/db2_create_eassdb_20140901150303.sh
db2 "create db evczdb using codeset GBK territory CN pagesize 8192 catalog tablespace managed by database using (file '/db2ffcsdata1/evczdb/syscatspace_c1' 131072 ) user tablespace managed by database using (file '/db2ffcsdata1/evczdb/userspace1_c1' 131072 ) temporary tablespace managed by system using ('/db2ffcstmptbs/evczdb/tempspace1')"
[db2iffcs@h15693 tmp]$ sh db2_create_eassdb_20140901150303.sh
DB20000I The CREATE DATABASE command completed successfully.3.创建额外BufferPool及表空间
db2 => connect to evczdb
Database Connection Information
Database server = DB2/LINUXX8664 9.7.7
SQL authorization ID = DB2IFFCS
Local database alias = EVCZDB
db2 => create bufferpool buffer_assp8k size 25600 pagesize 8k
DB20000I The SQL command completed successfully.
db2 => create bufferpool buffer_idx8k size 25600 pagesize 8k
DB20000I The SQL command completed successfully.
db2 => create bufferpool buffer_clob32k size 6400 pagesize 32k
DB20000I The SQL command completed successfully.
db2 => create tablespace assp pagesize 8192 managed by database using (file '/db2ffcsdata1/evczdb/asspspace_c1' 131072) bufferpool buffer_assp8k autoresize no
DB20000I The SQL command completed successfully.
db2 => create tablespace assp_index pagesize 8192 managed by database using (file '/db2ffcsdata1/evczdb/idxspace_c1' 131072) bufferpool buffer_idx8k autoresize no
DB20000I The SQL command completed successfully.
db2 => create tablespace assp_clob pagesize 32768 managed by database using (file '/db2ffcsdata1/evczdb/clobspace_c1' 32768) bufferpool buffer_clob32k
DB20000I The SQL command completed successfully.4.为数据库应用用户授权
db2 => grant connect on database to user evcz
grant bindadd on database to user evcz
grant createtab on database to user evcz
DB20000I The SQL command completed successfully.
db2 => DB20000I The SQL command completed successfully.
db2 => DB20000I The SQL command completed successfully.
db2 => grant implicit_schema on database to user evcz
DB20000I The SQL command completed successfully.
db2 => grant load on database to user evcz
DB20000I The SQL command completed successfully.
db2 => grant use of tablespace assp to user evcz
DB20000I The SQL command completed successfully.
db2 => grant use of tablespace assp_index to user evcz
DB20000I The SQL command completed successfully.
db2 => grant use of tablespace assp_clob to user evcz
DB20000I The SQL command completed successfully.
db2 =>5.做必要核对检查工作
测试数据库应用用户evcz是否可以正常登陆，列出当前数据库中的所有表空间。
[db2iffcs@h15693 tmp]$ su evcz
Password:
[evcz@h15693 tmp]$ db2
(c) Copyright IBM Corporation 1993,2007
Command Line Processor for DB2 Client 9.7.7
You can issue database manager commands and SQL statements from the command
prompt. For example:
db2 => connect to sample
db2 => bind sample.bnd
For general help, type: ?.
For command help, type: ? command, where command can be
the first few keywords of a database manager command. For example:
? CATALOG DATABASE for help on the CATALOG DATABASE command
? CATALOG for help on all of the CATALOG commands.
To exit db2 interactive mode, type QUIT at the command prompt. Outside
interactive mode, all commands must be prefixed with 'db2'.
To list the current command option settings, type LIST COMMAND OPTIONS.
For more detailed help, refer to the Online Reference Manual.
db2 => connect to evczdb user evcz using evcz
Database Connection Information
Database server = DB2/LINUXX8664 9.7.7
SQL authorization ID = EVCZ
Local database alias = EVCZDB
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.
State = 0x0000
Detailed explanation:
Normal
Total pages = 131072
Useable pages = 131040
Used pages = 31872
Free pages = 99168
High water mark (pages) = 31872
Page size (bytes) = 8192
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
Tablespace ID = 1
Name = TEMPSPACE1
Type = System managed space
Contents = System Temporary data
State = 0x0000
Detailed explanation:
Normal
Total pages = 1
Useable pages = 1
Used pages = 1
Free pages = Not applicable
High water mark (pages) = Not applicable
Page size (bytes) = 8192
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
Tablespace ID = 2
Name = USERSPACE1
Type = Database managed space
Contents = All permanent data. Large table space.
State = 0x0000
Detailed explanation:
Normal
Total pages = 131072
Useable pages = 131040
Used pages = 96
Free pages = 130944
High water mark (pages) = 96
Page size (bytes) = 8192
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
Tablespace ID = 3
Name = SYSTOOLSPACE
Type = Database managed space
Contents = All permanent data. Large table space.
State = 0x0000
Detailed explanation:
Normal
Total pages = 4096
Useable pages = 4092
Used pages = 108
Free pages = 3984
High water mark (pages) = 108
Page size (bytes) = 8192
Extent size (pages) = 4
Prefetch size (pages) = 4
Number of containers = 1
Tablespace ID = 4
Name = ASSP
Type = Database managed space
Contents = All permanent data. Large table space.
State = 0x0000
Detailed explanation:
Normal
Total pages = 131072
Useable pages = 131040
Used pages = 96
Free pages = 130944
High water mark (pages) = 96
Page size (bytes) = 8192
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
Tablespace ID = 5
Name = ASSP_INDEX
Type = Database managed space
Contents = All permanent data. Large table space.
State = 0x0000
Detailed explanation:
Normal
Total pages = 131072
Useable pages = 131040
Used pages = 96
Free pages = 130944
High water mark (pages) = 96
Page size (bytes) = 8192
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
Tablespace ID = 6
Name = ASSP_CLOB
Type = Database managed space
Contents = All permanent data. Large table space.
State = 0x0000
Detailed explanation:
Normal
Total pages = 32768
Useable pages = 32736
Used pages = 96
Free pages = 32640
High water mark (pages) = 96
Page size (bytes) = 32768
Extent size (pages) = 32
Prefetch size (pages) = 32
Number of containers = 1
db2 => 好了，至此数据库已搭建完成。