34.重置数据库快照
35.计算缓冲池命中率
理想情况下缓冲池命中率在95%以上,计算公式如下:
(1 -((buffer pool data physical reads + buffer pool index physical reads)
/(buffer pool data logical reads + pool index logical reads))) *100% |
36.创建db2实例
37.删除db2实例
38.设置当前db2实例
39.显示db2拥有的实例
40.恢复离线增量备份数据库的命令
DB2 RESTORE DATABASE YNDC INCREMENTAL AUTOMATIC FROM
D:\backup\autobak\db2 TAKEN AT 20060314232015 |
41.创建样本数据库
在unix平台,使用:
sqllib/bin/db2sampl <path> |
在windows,os/2平台,使用:db2sampl e,e是可选参数,指定将创建数据库的驱动器;
42.列出数据库中所有的表
43.列出某个表的数据结构
db2 describe table v_ro_role |
44.给表增加列
ALTER TABLE STAFF
ADD COLUMN PNHONE VARCHAR(20) |
45.数据迁移方法1
export脚本示例
db2 connect to testdb user test password test
db2 "export to aa1.ixf of ixf select * from table1"
db2 "export to aa2.ixf of ixf select * from table2"
db2 connect reset |
import脚本示例
db2 connect to testdb user test password test
db2 "load from aa1.ixf of ixf replace into table1 COPY NO without prompting "
db2 "load from aa2.ixf of ixf replace into table2 COPY NO without prompting "
db2 connect reset |