Oracle教程之sql loader的应用（二）

3、普通模式导入
——建立控制文件
（控制文件有两种方式，一种是指明数据存放的路径，一种是将数据文件和控制文件放到一起，数据量大时采用前者）
[oracle@work sqlldr]$ vi emp.ctl
load data
infile '/home/oracle/sqlldr/emp.dat'
insert ——insert 插入表必须是空表，非空表用append
into table emp1
fields terminated by ','
optionally enclosed by '"'
(
empno,
ename,
job,
mgr,
hiredate,
comm,
sal,
deptno)
——执行导入（normal）
[oracle@solaris10 sqlldr]$sqlldr scott/tiger control=emp.ctl log=emp.log
——执行导入的语句，指明用户/口令、控制文件的位置和导入生成日志的位置
SQL*Loader: Release 10.2.0.2.0 - Production on Fri Mar 16 14:30:47 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Commit point reached - logical record count 14
——查看日志
[oracle@work sqlldr]$ more emp.log
[oracle@solaris10 sqlldr]$sqlldr scott/tiger control=emp.ctl log=emp.log
SQL*Loader: Release 10.2.0.2.0 - Production on Fri Mar 16 14:30:47 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Commit point reached - logical record count 14
[oracle@solaris10 sqlldr]$more emp.log
SQL*Loader: Release 10.2.0.2.0 - Production on Fri Mar 16 14:30:47 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Control File: emp.ctl
Data File: /export/home/oracle/sqlldr/emp.dat
Bad File: emp.bad
Discard File: none specified
(Allow all discards)
Number to load: ALL
Number to skip: 0
Errors allowed: 50
Bind array: 64 rows, maximum of 256000 bytes
Continuation: none specified
Path used: Conventional
Table EMP1, loaded from every logical record.
Insert option in effect for this table: INSERT
Column Name Position Len Term Encl Datatype
------------------------------ ---------- ----- ---- ---- ---------------------
EMPNO FIRST * , O(") CHARACTER
ENAME NEXT * , O(") CHARACTER
JOB NEXT * , O(") CHARACTER
MGR NEXT * , O(") CHARACTER
HIREDATE NEXT * , O(") CHARACTER
COMM NEXT * , O(") CHARACTER
SAL NEXT * , O(") CHARACTER
DEPTNO NEXT * , O(") CHARACTER
Table EMP1:
14 Rows successfully loaded.
0 Rows not loaded due to data errors.
0 Rows not loaded because all WHEN clauses were failed.
0 Rows not loaded because all fields were null.
Space allocated for bind array: 132096 bytes(64 rows)
Read buffer bytes: 1048576
Total logical records skipped: 0
Total logical records read: 14
Total logical records rejected: 0
Total logical records discarded: 0
Run began on Fri Mar 16 14:30:47 2012
Run ended on Fri Mar 16 14:30:47 2012
Elapsed time was: 00:00:00.50
CPU time was: 00:00:00.02
——验证
12:18:51 SQL> select * from scott.emp1;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 8000 20
7499 ALLEN SALESMAN 7698 20-FEB-81 300 1600 30
7521 WARD SALESMAN 7698 22-FEB-81 500 1250 30
7566 JONES MANAGER 7839 02-APR-81 8000 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1400 1250 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2000 10
7788 SCOTT ANALYST 7566 19-APR-87 100 2000 10
7839 KING PRESIDENT 17-NOV-81 2000 10
7844 TURNER SALESMAN 7698 08-SEP-81 0 1500 30
7876 ADAMS CLERK 7788 23-MAY-87 8000 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 8000 20
7934 MILLER CLERK 7782 23-JAN-82 2000 10
14 rows selected.
12:18:57 SQL>
12:19:45 SQL> analyze table emp1 compute statistics;
Table analyzed.
SQL> select table_name,num_rows,blocks,empty_blocks from user_tables where table_name='EMP1';
TABLE_NAME NUM_ROWS BLOCKS EMPTY_BLOCKS
-------------------- ---------- ---------- ------------
EMP1 14 60 68
——数据源和控制文件在一起
[oracle@work sqlldr]$ vi emp.ctl
load data
infile * ——不需要指明数据源了
append
into table emp1
fields terminated by ','
optionally enclosed by '"'
(
empno,
ename,
job,
mgr,
hiredate,
comm,
sal,
deptno)
begindata ——要以该关键字开头
7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,,20
7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30
7521,WARD,SALESMAN,7698,1981-02-22 00:00:00,1250,500,30
7566,JONES,MANAGER,7839,1981-04-02 00:00:00,2975,,20
7654,MARTIN,SALESMAN,7698,1981-09-28 00:00:00,1250,1400,30
7698,BLAKE,MANAGER,7839,1981-05-01 00:00:00,2850,,30
7782,CLARK,MANAGER,7839,1981-06-09 00:00:00,2450,,10
7788,SCOTT,ANALYST,7566,1987-04-19 00:00:00,3000,,20
7839,KING,PRESIDENT,,1981-11-17 00:00:00,5000,,10
7844,TURNER,SALESMAN,7698,1981-09-08 00:00:00,1500,0,30
7876,ADAMS,CLERK,7788,1987-05-23 00:00:00,1100,,20
7900,JAMES,CLERK,7698,1981-12-03 00:00:00,950,,30
[oracle@solaris10 sqlldr]$sqlldr scott/tiger control=emp.ctl log=emp.log
SQL*Loader: Release 10.2.0.2.0 - Production on Fri Mar 16 14:46:04 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Commit point reached - logical record count 14
SQL> select * from scott.emp1;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 8000 20
7499 ALLEN SALESMAN 7698 20-FEB-81 300 1600 30
7521 WARD SALESMAN 7698 22-FEB-81 500 1250 30
7566 JONES MANAGER 7839 02-APR-81 8000 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1400 1250 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2000 10
7788 SCOTT ANALYST 7566 19-APR-87 100 2000 10
7839 KING PRESIDENT 17-NOV-81 2000 10
7844 TURNER SALESMAN 7698 08-SEP-81 0 1500 30
7876 ADAMS CLERK 7788 23-MAY-87 8000 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 8000 20
7934 MILLER CLERK 7782 23-JAN-82 2000 10
7369 SMITH CLERK 7902 17-DEC-80 8000 20
7499 ALLEN SALESMAN 7698 20-FEB-81 300 1600 30
7521 WARD SALESMAN 7698 22-FEB-81 500 1250 30
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7566 JONES MANAGER 7839 02-APR-81 8000 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1400 1250 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2000 10
7788 SCOTT ANALYST 7566 19-APR-87 100 2000 10
7839 KING PRESIDENT 17-NOV-81 2000 10
7844 TURNER SALESMAN 7698 08-SEP-81 0 1500 30
7876 ADAMS CLERK 7788 23-MAY-87 8000 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 8000 20
7934 MILLER CLERK 7782 23-JAN-82 2000 10
28 rows selected.
SQL> analyze table emp1 compute statistics;
Table analyzed.
SQL> select table_name,num_rows,blocks,empty_blocks from user_tables where table_name='EMP1';
TABLE_NAME NUM_ROWS BLOCKS EMPTY_BLOCKS
-------------------- ---------- ---------- ------------
EMP1 28 60 68——普通导入是将数据导入到高水位上的块
4、直接导入（direct）
12:28:23 SQL> analyze table emp1 compute statistics;
Table analyzed.
12:28:26 SQL> select table_name,num_rows,blocks,empty_blockS from user_tables
12:28:27 2 where table_name='EMP1';
TABLE_NAME NUM_ROWS BLOCKS EMPTY_BLOCKS
------------------------------ ---------- ---------- ------------
EMP1 268 8 0
[oracle@work sqlldr]$ vi emp.ctl
load data
infile *
append
into table emp1
fields terminated by ','
optionally enclosed by '"'
(
empno,
ename,
job,
mgr,
hiredate,
comm,
sal,
deptno) //字段的类型和记录的类型和顺序必须一致。
begindata
7369,SMITH,CLERK,7902,17-DEC-80,8000,,20
[oracle@work sqlldr]$ sqlldr scott/tiger control=emp.ctl log=emp.log direct=y ——标明是采取直接导入的方式
SQL*Loader: Release 10.2.0.1.0 - Production on Thu Aug 11 12:28:55 2011
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Load completed - logical record count 1.
SQL> analyze table emp1 compute statistics;
Table analyzed.
SQL> select table_name,num_rows,blocks,empty_blocks from user_tables where table_name='EMP1';
TABLE_NAME NUM_ROWS BLOCKS EMPTY_BLOCKS
-------------------- ---------- ---------- ------------
EMP1 29 65 6
---虽然只导入了一条记录，但oracle又重新给我们分配了一个新的extent（8 个blocks）