1. Database connection and disconnection database
连接数据库
connect scott/123456;
断开数据库
disconn;
2. View the table structure
describe scott.emp;
3. View Data Sheet
select empno.job.mgr.sal;
4. Save the buffer to the file sql statement
save scott_emp_query.sql
The contents of the file is read into the buffer
get scott_emp_query.sql list
6. Use the start command to read and run the sql file
start scott_emp_query.sql
7. Save the output to the specified file
spool scott_emp_outcome.txt append
8. The statement with variables
select empno.ename.mgr.sal.deptno
from scott.emp
where empno >=&temp;
9. statement with two variables (two entries)
select &column_name.deptno
from scott.emp
where &column_name>=7850;
10. The two variables with a statement (last input)
select &&column_name .deptno
from scott.emp
where &&column_name>=7850;
11. Non-display "at cost" and "new value" information
set veryify off;(on是显示)
New tactics: slash "/" Run again above query
12. Variables defined character set
set define '@'(设置以后定义变量的字符就变为@.&无效)
13. execute sql file statements
@ D:\Chengf\temp.sql (此处应当注意，路径是区分大小写的)
14. Use define constant view
define;
15. Constant grammar
设置常量
define temp=7850
查看常量
define temp
删除常量
undefine temp
16. The use of column format the output
column empno heading '员工编号' format 9999
column ename heading '员工姓名' format a10
column mgr heading '上级编号' format 9999
column hiredate heading '受雇日期' justfify center
column sal heading '员工工资' format $999.999.99
17. The row number is provided a data display
set pagesize 20
18. Set row shows how many characters
set linesize 20
19. Set the header and footer
ttitle页眉.btitle页脚
20.break command packet, compute command to calculate and
break on deptno;
compute sum of sal on deptno;
select empno.ename.mgr.sal.deptno
from scott.emp order by deptno;
21. Clear column format
clear columns
22. Create a permanent table space
create tablespace myspace
datafile '文件路径'
size 文件大小
autoextend on next 自动增加大小
maxsize 文件最大值
23. Check the table space properties
select * from dba_tablespace wheretablespace_name='表空间名';
Table 24. Change the state space
alter tablespace 表空间名 表空间状态;
25. Modify the table space name
alter tablespace 表空间名1 rename to 表空间名2;
26. The use of free space in the data dictionary to see information
select * from dba_free_space where tablespace_name='表空间名称';
27. The use of the data dictionary view the table space data file information
select * from dba_data_files wheretablespace_name='表空间名称';
28. The modified table space corresponding to the size of the data file
alter database
datafile '表空间文件路径名称'
resize 大小
29. Add a new data file for the table space
alter tablespace myspace
add datafile '数据文件路径名称'
size 大小
autoextend on next 自增大小 maxsize 最大值;
30. Delete myspace table space data file
alter tablespace myspace
drop datafile '数据文件名称';
31. The modified automatic scalability myspace tablespace data files
alter database
datafile '表空间文件路径名称'
autoextend off;
32. Set the file status table space is offline drop
alter database
datafile '表空间路径名称'
offline drop;
33. Mobile data file tablespace
(1)alter tablespace 表空间名称 offline;先设置表空间状态为offline
(2)手动操作.将磁盘中的表空间数据文件移动到新的路径
(3)使用alter tablespace语句修改表空间文件路径名称
alter tablespace myspace
rename datafile '表空间路径名称'
to
'新的表空间路径名称';
(4)修改myspace表空间状态
alter tablespace 表空间名称 online;
34. Delete table space
drop tablespace 表空间名称
including contents and datafiles;
35. Create a temporary table space
create temporary tablespace 表空间名称
tempfile '表空间路径名称'
size 大小
autoextend on next 自增大小 maxsize 最大大小;
36. Create a temporary table space where the group will be designated as group1
create temporary tablespace 表空间名称
tempfile '表空间路径名称'
size 大小
tablespace group group1;
37. modify the temporary table space group
alter tablespace 临时表空间名称 tablespace group group2;
38. Create a large table space
create bigfile tabliespace mybigspace
datafile '表空间路径名称'
size 大小;
39. Modify the default table space
alter database default tablespace 表空间名称;
40. Create a temporary table level things
create global temporary table temp_student(
)on commit delete rows（事物级别的意思）;
41. The use of a temporary table level things
select * from temp_student;
commit;提交事物。
提交后表还在.但数据被清除
42. Create a temporary table session
create global temporary table temp_book(
)on commit preserve rows（会话级别的意思）;
commit；
断开该用户连接才会清除数据
43. The external file is read
first documented in the corresponding path
and then
create directory external_card as'E:\external';
creates a corresponding path
The next step is to create an external table
create table e_card(
对应的数据
)organization external(
//里边这一团是什么东西噢
type oracle_loader//指定访问外部数据文件的驱动程序.oracle默认为oracle_loader
default directory external_card //对应上一步路径
access parameters(
fields terminated by '.')
location ('蓝胖子没有耳朵.txt')
);
Use 44.reject limit of the sentence
External table error-prone. With this allows numerous errors
create table e_card(
对应的数据
)organization external(
type oracle_loader
default directory external_card
access parameters(
fields terminated by '.')
location ('card.txt')
)reject limit unlimited;
45. The store error data to a specified file
create table e_card(
对应的数据
)organization external(
type oracle_loader
default directory external_card
access parameters(
records delimited by newline
badfile 'card_bad.txt'
fields terminated by '.')
location ('card.txt')
);
46. The error log file
create table e_card(
对应的数据
)organization external(
type oracle_loader
default directory external_card
access parameters(
records delimited by newline
badfile 'card_bad.txt'
logfile 'card_log.txt'
fields terminated by '.')
location ('card.txt')
);
47. Create a range partitioned table
create table part_book(
数据库内容
)partition by range(booktime)(
partition part1 values less than ('01-1月-2008')tablespacemytemp1.
partition part2 values less than ('01-1月-2009')tablespacemytemp2.
partition part1 values less than (maxvalue)tablespacemytemp3
)
48. Create a hash-partitioned tables
create table part_book(
数据库内容
)partition by hash(bid)(
partition part1 tablespace mytemp1.
partition part2 tablespace mytemp2.
)
49. Create a list partition tables
create table part_book(
数据库内容
)partition by list(bookpress)(
partition part1 values ('chengf') tablespace mytemp1.
partition part1 values ('blog') tablespace mytemp2
)
50. Create Composite range-hash partitioned table
create table part_book(
数据库内容
)partition by range(booktime)
subpartition by hash(bid)
subpartitions 2 store in(mytemp1.mytemp2)
(
partition part1 values less than ('01-1月-2008').
partition part1 values less than ('01-1月-2009').
partition part1 values less than (maxvalue)
);