mysql drop table 恢复

对于MySQL数据库的innodb引擎的数据库中,由于误操作删除表,或者由于sqldump自动生成语句含drop table create table语句导致数据丢失,在没有覆盖的情况下,可以实现完美恢复
创建测试表

mysql> CREATE TABLE recover.`t_drop` (
    ->   `messageId` varchar(30) NOT NULL,
    ->   `msgContent` varchar(1000) default NULL,
    ->   `scheduleDate` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
    ->   `deliverState` int(1) default NULL,
    ->   PRIMARY KEY  (`messageId`)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Query OK, 0 rows affected (0.00 sec)

mysql> insert into recover.t_drop select messageId,msgContent,scheduleDate,deliverState from sms_send_record;
Query OK, 11 rows affected (0.00 sec)
Records: 11  Duplicates: 0  Warnings: 0

mysql> select * from recover.`t_drop`;
+--------------------+----------------------------------------------------------------------------------+---------------------+--------------+
| messageId          | msgContent                                                                       | scheduleDate        | deliverState |
+--------------------+----------------------------------------------------------------------------------+---------------------+--------------+
| 10235259536125650  | 尊敬的用户您好:您的手机验证码为474851如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 10235353811295807  | 尊敬的用户您好:您的手机验证码为444632如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 102354211240398235 | 尊敬的用户您好:您的手机验证码为478503如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 102354554052884567 | 尊敬的用户您好:您的手机验证码为216825如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 132213454294519126 | 尊敬的用户您好:您的手机验证码为854812如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 82329022242584577  | 尊敬的用户您好:您的手机验证码为253127如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 82329022242584581  | 尊敬的用户您好:您的手机验证码为253127如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 8233400415607376   | 尊敬的用户您好:您的手机验证码为338470如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 82334502212106951  | 尊敬的用户您好:您的手机验证码为916515如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 82339012756833423  | 尊敬的用户您好:您的手机验证码为396108如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
| 8234322198577796   | 尊敬的用户您好:您的手机验证码为935297如非本人操作,请拨打奥斯卡客服:400-620-757    | 2010-01-01 00:00:00 |            0 | 
+--------------------+----------------------------------------------------------------------------------+---------------------+--------------+
11 rows in set (0.00 sec)

mysql> checksum table t_drop;
+-----------------+-----------+
| Table           | Checksum  |
+-----------------+-----------+
| recover.t_drop  | 920719058 | 
+-----------------+-----------+
1 row in set (0.00 sec)

删除测试表,后续用来恢复

mysql> drop table recover.t_drop;
Query OK, 0 rows affected (0.00 sec)

解析ibdata文件

[root@web103 mysql_recovery]# ./stream_parser -f /var/lib/mysql/ibdata1 
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440825416 Sat Aug 29 13:16:56 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440855928 Sat Aug 29 21:45:28 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Opening file: /var/lib/mysql/ibdata1
File information:

ID of device containing file:         2049
inode number:                      1344553
protection:                         100660 (regular file)
number of hard links:                    1
user ID of owner:                       27
group ID of owner:                      27
device ID (if special file):             0
blocksize for filesystem I/O:         4096
number of blocks allocated:         463312
time of last access:            1440855928 Sat Aug 29 21:45:28 2015
time of last modification:      1440855835 Sat Aug 29 21:43:55 2015
time of last status change:     1440855835 Sat Aug 29 21:43:55 2015
total size, in bytes:            236978176 (226.000 MiB)

Size to process:                 236978176 (226.000 MiB)
Worker(1): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(0): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(4): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(3): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(2): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(7): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(5): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
Worker(6): 56.64% done. 2015-08-29 21:45:30 ETA(in 00:00:01). Processing speed: 8.000 MiB/sec
All workers finished in 1 sec

恢复mysql字典

[root@web103 mysql_recovery]# ./recover_dictionary.sh 
Generating dictionary tables dumps... OK
Creating test database ... OK
Creating dictionary tables in database test:
SYS_TABLES ... OK
SYS_COLUMNS ... OK
SYS_INDEXES ... OK
SYS_FIELDS ... OK
All OK
Loading dictionary tables data:
SYS_TABLES ... 162 recs OK
SYS_COLUMNS ... 1247 recs OK
SYS_INDEXES ... 216 recs OK
SYS_FIELDS ... 411 recs OK
All OK
[root@web103 mysql_recovery]# mysql test
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10162
Server version: 5.0.95 Source distribution

Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select * from SYS_TABLES WHERE name like 'recover%';
+-------------------------+-----+--------+------+--------+---------+--------------+-------+
| NAME                    | ID  | N_COLS | TYPE | MIX_ID | MIX_LEN | CLUSTER_NAME | SPACE |
+-------------------------+-----+--------+------+--------+---------+--------------+-------+
| recover/#sql-64a9_1f6d  | 120 |      8 |    1 |      0 |       0 |              |     0 | 
| recover/#sql2-64a9-1f6d | 115 |      8 |    1 |      0 |       0 |              |     0 | 
| recover/t_delete        |  74 |      2 |    1 |      0 |       0 |              |     0 | 
| recover/t_delete1       |  84 |      2 |    1 |      0 |       0 |              |     0 | 
| recover/t_drop          | 125 |      4 |    1 |      0 |       0 |              |     0 | 
| recover/t_truncate      | 120 |      8 |    1 |      0 |       0 |              |     0 | 
| recover/t_xifenfei      |  75 |      2 |    1 |      0 |       0 |              |     0 | 
| recover/zx_users        |  89 |     85 |    1 |      0 |       0 |              |     0 | 
+-------------------------+-----+--------+------+--------+---------+--------------+-------+
8 rows in set (0.00 sec)

mysql> select * from SYS_INDEXES WHERE TABLE_ID=125;
+----------+-----+---------+----------+------+-------+------------+
| TABLE_ID | ID  | NAME    | N_FIELDS | TYPE | SPACE | PAGE_NO    |
+----------+-----+---------+----------+------+-------+------------+
|      125 | 142 | PRIMARY |        1 |    3 |     0 | 4294967295 | 
+----------+-----+---------+----------+------+-------+------------+
1 row in set (0.00 sec)

恢复被删除表记录

[root@web103 mysql_recovery]# ./c_parser -5f pages-ibdata1/FIL_PAGE_INDEX/0000000000000142.page  -t dictionary/t_drop.sql >dumps/default/t_drop 2>2.sql
[root@web103 mysql_recovery]# more dumps/default/t_drop
-- Page id: 9860, Format: COMPACT, Records list: Valid, Expected records: (11 11)
00000099F9F2    80000026800110  t_drop  "10235259536125650"     "尊敬的用户您好:您的手机验证码为474851如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    80000026800129  t_drop  "10235353811295807"     "尊敬的用户您好:您的手机验证码为444632如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    80000026800142  t_drop  "102354211240398235"    "尊敬的用户您好:您的手机验证码为478503如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    8000002680015C  t_drop  "102354554052884567"    "尊敬的用户您好:您的手机验证码为216825如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    80000026800176  t_drop  "132213454294519126"    "尊敬的用户您好:您的手机验证码为854812如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    80000026800190  t_drop  "82329022242584577"     "尊敬的用户您好:您的手机验证码为253127如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    800000268001A9  t_drop  "82329022242584581"     "尊敬的用户您好:您的手机验证码为253127如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    800000268001C2  t_drop  "8233400415607376"      "尊敬的用户您好:您的手机验证码为338470如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    800000268001DA  t_drop  "82334502212106951"     "尊敬的用户您好:您的手机验证码为916515如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    800000268001F3  t_drop  "82339012756833423"     "尊敬的用户您好:您的手机验证码为396108如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
00000099F9F2    8000002680020C  t_drop  "8234322198577796"      "尊敬的用户您好:您的手机验证码为935297如非本人操作,请拨打奥斯卡客服:400-620-7575。"  "2010-01-01 00:00:00"   0
-- Page id: 9860, Found records: 11, Lost records: NO, Leaf page: YES

恢复数据入库

mysql> source dictionary/t_drop.sql
Query OK, 0 rows affected (0.00 sec)

mysql> source 2.sql
Query OK, 0 rows affected (0.00 sec)

Query OK, 11 rows affected (0.00 sec)
Records: 11  Deleted: 0  Skipped: 0  Warnings: 0

mysql> checksum table t_drop;
+-----------------+-----------+
| Table           | Checksum  |
+-----------------+-----------+
| recover.t_drop  | 920719058 | 
+-----------------+-----------+
1 row in set (0.00 sec)

至此实现删除数据完美恢复

dul恢复drop表测试

dul对被drop对象进行恢复,需要提供两个信息
1.被删除表所属表空间(非必须)
2.被删除表结构(必须)
模拟删除表

--创建测试表
SQL> create table t_dul_drop tablespace czum
  2  as
  3  select * from dba_tables;

Table created.

--备份被删除表数据,便于比较和提供测试表结构
SQL> create table t_dul_drop_bak tablespace users
  2  as select * from t_dul_drop;

Table created.

SQL> alter system switch logfile;

System altered.

SQL> select count(*) from t_dul_drop;

  COUNT(*)
----------
      1785

SQL> drop table chf.t_dul_drop purge;

Table dropped.

SQL> alter system checkpoint;

System altered.

使用logminer找到data_object_id

delete from "SYS"."OBJ$" where "OBJ#" = '68474' and "DATAOBJ#" = '68474' 
and "OWNER#" = '61' and "NAME" = 'T_DUL_DROP' and "NAMESPACE" = '1' and 
"SUBNAME" IS NULL and "TYPE#" = '2' and "CTIME" = TO_DATE('04-FEB-13', 'DD-MON-RR') 
and "MTIME" = TO_DATE('04-FEB-13', 'DD-MON-RR') and "STIME" = TO_DATE('04-FEB-13', 'DD-MON-RR')
and "STATUS" = '1' and "REMOTEOWNER" IS NULL and "LINKNAME" IS NULL and "FLAGS" = '0' 
and "OID$" IS NULL and "SPARE1" = '6' and "SPARE2" = '1' and "SPARE3" = '61' and 
"SPARE4" IS NULL and "SPARE5" IS NULL and "SPARE6" IS NULL and ROWID = 'AAAAASAABAAAPzCAAV';

这里可以知道,被删除表的data_object_id为68474

DUL恢复被删除表

--dul版本
E:\dul10>dul.exe

Data UnLoader 10.2.4.37 - Oracle Internal Only - on Mon Feb 04 23:49:50 2013
with 64-bit io functions

Copyright (c) 1994 2010 Bernard van Duijnen All rights reserved.

 Strictly Oracle Internal use Only

DUL>  ALTER SESSION SET USE_SCANNED_EXTENT_MAP = TRUE;
Parameter altered

--扫描所属表空间
DUL> scan tablespace 6;
Scanning tablespace 6, data file 6 ...
  13 segment header and 331 data blocks
  tablespace 6, data file 6: 1279 blocks scanned
Reading EXT.dat 13 entries loaded and sorted 13 entries
Reading SEG.dat 13 entries loaded
Reading COMPATSEG.dat 0 entries loaded
Reading SCANNEDLOBPAGE.dat 0 entries loaded and sorted 0 entries

--scan tables得到需求表(可以核对数据样例)
DUL> scan tables;
UNLOAD TABLE OBJNO68474 ( COL001 VARCHAR2(11), COL002 VARCHAR2(30), COL003 VARCHAR2(6)
        , COL004 VARCHAR2(20), COL005 VARCHAR2(30), COL006 VARCHAR2(5), COL007 NUMBER
        , COL008 NUMBER, COL009 NUMBER, COL010 NUMBER, COL011 NUMBER
        , COL012 NUMBER, COL013 NUMBER, COL014 NUMBER, COL015 CHAR
        , COL016 NUMBER, COL017 NUMBER, COL018 VARCHAR2(3), COL019 VARCHAR2(1)
        , COL020 NUMBER, COL021 NUMBER, COL022 NUMBER, COL023 NUMBER
        , COL024 NUMBER, COL025 NUMBER, COL026 NUMBER, COL027 NUMBER
        , COL028 VARCHAR2(10), COL029 VARCHAR2(10), COL030 VARCHAR2(5), COL031 VARCHAR2(7)
        , COL032 NUMBER, COL033 DATE, COL034 VARCHAR2(3), COL035 VARCHAR2(12)
        , COL036 VARCHAR2(1), COL037 VARCHAR2(1), COL038 VARCHAR2(3), COL039 VARCHAR2(7)
        , COL040 VARCHAR2(7), COL041 VARCHAR2(7), COL042 VARCHAR2(8), COL043 VARCHAR2(3)
        , COL044 VARCHAR2(2), COL045 VARCHAR2(15), COL046 VARCHAR2(8), COL047 VARCHAR2(3)
        , COL048 VARCHAR2(3), COL049 VARCHAR2(8), COL050 VARCHAR2(8), COL051 VARCHAR2(5)
        , COL052 VARCHAR2(2), COL053 VARCHAR2(2), COL054 VARCHAR2(3), COL055 VARCHAR2(7) )
    STORAGE( DATAOBJNO 68474 );

--恢复删除表(业务提供表结构)
DUL> unload table t_dul_drop(
  2  OWNER                              VARCHAR2(30),
  3  TABLE_NAME                         VARCHAR2(30),
  4  TABLESPACE_NAME                                    VARCHAR2(30),
  5  CLUSTER_NAME                                       VARCHAR2(30),
  6  IOT_NAME                                           VARCHAR2(30),
  7  STATUS                                             VARCHAR2(8) ,
  8  PCT_FREE                                           NUMBER      ,
  9  PCT_USED                                           NUMBER      ,
 10  INI_TRANS                                          NUMBER      ,
 11  MAX_TRANS                                          NUMBER      ,
 12  INITIAL_EXTENT                                     NUMBER      ,
 13  NEXT_EXTENT                                        NUMBER      ,
 14  MIN_EXTENTS                                        NUMBER      ,
 15  MAX_EXTENTS                                        NUMBER      ,
 16  PCT_INCREASE                                       NUMBER      ,
 17  FREELISTS                                          NUMBER      ,
 18  FREELIST_GROUPS                                    NUMBER      ,
 19  LOGGING                                            VARCHAR2(3) ,
 20  BACKED_UP                                          VARCHAR2(1) ,
 21  NUM_ROWS                                           NUMBER      ,
 22  BLOCKS                                             NUMBER      ,
 23  EMPTY_BLOCKS                                       NUMBER      ,
 24  AVG_SPACE                                          NUMBER      ,
 25  CHAIN_CNT                                          NUMBER      ,
 26  AVG_ROW_LEN                                        NUMBER      ,
 27  AVG_SPACE_FREELIST_BLOCKS                          NUMBER      ,
 28  NUM_FREELIST_BLOCKS                                NUMBER      ,
 29  DEGREE                                             VARCHAR2(20),
 30  INSTANCES                                          VARCHAR2(20),
 31  CACHE                                              VARCHAR2(10),
 32  TABLE_LOCK                                         VARCHAR2(8) ,
 33  SAMPLE_SIZE                                        NUMBER      ,
 34  LAST_ANALYZED                                      DATE        ,
 35  PARTITIONED                                        VARCHAR2(3) ,
 36  IOT_TYPE                                           VARCHAR2(12),
 37  TEMPORARY                                          VARCHAR2(1) ,
 38  SECONDARY                                          VARCHAR2(1) ,
 39  NESTED                                             VARCHAR2(3) ,
 40  BUFFER_POOL                                        VARCHAR2(7) ,
 41  FLASH_CACHE                                        VARCHAR2(7) ,
 42  CELL_FLASH_CACHE                                   VARCHAR2(7) ,
 43  ROW_MOVEMENT                                       VARCHAR2(8) ,
 44  GLOBAL_STATS                                       VARCHAR2(3) ,
 45  USER_STATS                                         VARCHAR2(3) ,
 46  DURATION                                           VARCHAR2(15),
 47  SKIP_CORRUPT                                       VARCHAR2(8) ,
 48  MONITORING                                         VARCHAR2(3) ,
 49  CLUSTER_OWNER                                      VARCHAR2(30),
 50  DEPENDENCIES                                       VARCHAR2(8) ,
 51  COMPRESSION                                        VARCHAR2(8) ,
 52  COMPRESS_FOR                                       VARCHAR2(12),
 53  DROPPED                                            VARCHAR2(3) ,
 54  READ_ONLY                                          VARCHAR2(3) ,
 55  SEGMENT_CREATED                                    VARCHAR2(3) ,
 56  RESULT_CACHE                                       VARCHAR2(7))
 57   STORAGE( DATAOBJNO 68474 );
. unloading table                T_DUL_DROP
DUL: Warning: Recreating file "T_DUL_DROP.ctl"
    1785 rows unloaded

模拟业务规则提供,创建表

SQL> create table t_dul_drop as select * from t_dul_drop_bak where 1=0;

Table created.

导入数据

e:\dul10>sqlldr chf/xifenfei control=T_DUL_DROP.ctl

SQL*Loader: Release 11.2.0.3.0 - Production on Mon Feb 4 23:35:57 2013

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恢复数据结果

SQL> select count(*) from t_dul_drop;

  COUNT(*)
----------
      1785

SQL> select owner,table_name from t_dul_drop where rownum<10;

OWNER                          TABLE_NAME
------------------------------ ------------------------------
SYS                            IDL_CHAR$
SYS                            IDL_UB2$
SYS                            IDL_SB4$
SYS                            ERROR$
SYS                            SETTINGS$
SYS                            NCOMP_DLL$
SYS                            PROCEDUREJAVA$
SYS                            PROCEDUREC$
SYS                            PROCEDUREPLSQL$

9 rows selected.