使用bbed不仅仅可以找回已经delete的数据还可以恢复update的数据,当然过程要比恢复delete的数据复杂一些。
实验过程如下:
SYS@ORCL>create table bbed_test(x int,y varchar2(20)); Table created. SYS@ORCL>insert into bbed_test values(1,'BADLY9'); 1 row created. SYS@ORCL>insert into bbed_test values(2,'JP'); 1 row created. SYS@ORCL>commit; Commit complete. SYS@ORCL>select rowid, dbms_rowid.rowid_relative_fno(rowid)rel_fno, 2 dbms_rowid.rowid_block_number(rowid)blockno, 3 dbms_rowid.rowid_row_number(rowid) rowno 4 from bbed_test; ROWID REL_FNO BLOCKNO ROWNO ------------------ ---------- ---------- ---------- AAAM0WAABAAAOuCAAA 1 60290 0 AAAM0WAABAAAOuCAAB 1 60290 1 SYS@ORCL>update bbed_test set y='JP1' where x=1; 1 row updated. SYS@ORCL>commit; Commit complete. SYS@ORCL>select dump(1,'16') from dual; DUMP(1,'16') ----------------- Typ=2 Len=2: c1,2 SYS@ORCL>select dump(2,'16') from dual; DUMP(2,'16') ----------------- Typ=2 Len=2: c1,3 SYS@ORCL>select dump('BADLY9',16) from dual; DUMP('BADLY9',16) ------------------------------- Typ=96 Len=6: 42,41,44,4c,59,39 SYS@ORCL>select dump('JP1','16') from dual; DUMP('JP1','16') ---------------------- Typ=96 Len=3: 4a,50,31 SYS@ORCL>select * from bbed_test; X Y ---------- -------------------- 1 JP1 2 JP
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时间: 2024-11-10 00:51:30