Oracle教程之sql loader的应用（一）

sql loader的应用（一）
1、模拟生成数据源
——建立脚本emp.sql【这里很多格式都会变，执行完以后记得执行另一个脚本恢复原样on.sql】
[oracle@work sqlldr]$ more emp.sql
set heading off
set feedback off
set time off
set linesize 120
set pagesize 0
set echo off
set trimspool off
spool /export/home/oracle/sqlldr/emp.dat
select empno||','||ename||','||job||','||mgr||','||hiredate||','||sal||','||comm||','||deptno from scott.emp;
spool off;
[oracle@solaris10 sqlplus]$vi on.sql
set heading on
set feedback on
set time on
set linesize 250
set pagesize 24
set echo on
set trimspool on
SQL> @/export/home/oracle/sqlldr/emp.sql
7369,SMITH,CLERK,7902,1980-12-17 00:00:00,800,,20
7499,ALLEN,SALESMAN,7698,1981-02-20 00:00:00,1600,300,30
7521,WARD,SALESMAN,7698,1981-02-22 00:00:00,1250,500,30
7566,JONES,MANAGER,7839,1981-04-02 00:00:00,2975,,20
7654,MARTIN,SALESMAN,7698,1981-09-28 00:00:00,1250,1400,30
7698,BLAKE,MANAGER,7839,1981-05-01 00:00:00,2850,,30
7782,CLARK,MANAGER,7839,1981-06-09 00:00:00,2450,,10
7788,SCOTT,ANALYST,7566,1987-04-19 00:00:00,3000,,20
7839,KING,PRESIDENT,,1981-11-17 00:00:00,5000,,10
7844,TURNER,SALESMAN,7698,1981-09-08 00:00:00,1500,0,30
7876,ADAMS,CLERK,7788,1987-05-23 00:00:00,1100,,20
7900,JAMES,CLERK,7698,1981-12-03 00:00:00,950,,30
7902,FORD,ANALYST,7566,1981-12-03 00:00:00,3000,,20
7934,MILLER,CLERK,7782,1982-01-23 00:00:00,1300,,10
SQL>
——查看数据源
[oracle@work sqlldr]$ more emp.dat
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
7902,FORD,ANALYST,7566,1981-12-03 00:00:00,3000,,20
7934,MILLER,CLERK,7782,1982-01-23 00:00:00,1300,,10
2、导入数据到表emp1
20:14:51 SQL> create table emp1 as select * from emp where 1=2;——创建一个只有表结构的空表
Table created.
20:14:56 SQL> analyze table emp1 compute statistics;——先分析表，以观察普通模式导入和直接导入的区别
Table analyzed.
20:15:03 SQL> col table_name for a15
20:16:48 SQL> select table_name,num_rows,blocks,empty_blocks from user_tables where table_name='EMP1';
TABLE_NAME NUM_ROWS BLOCKS EMPTY_BLOCKS
--------------- ---------- ---------- ------------
EMP1 0 0 128
1 row selected.