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Oracle中数据块中rownumber缺失该怎么办

Oracle中数据块中row number缺失该怎么办，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

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环境1：

  1. SCOTT@proc> drop table tt purge;

  3. Table dropped.

  5. SCOTT@proc>

  6. SCOTT@proc>

  7. SCOTT@proc> create table tt (id int,name varchar2(2000)) tablespace users;

  9. Table created.

  11. SCOTT@proc> insert into tt values(1,rpad('a',1800,'+'));

  13. 1 row created.

  15. SCOTT@proc> insert into tt values(2,rpad('b',1800,'+'));

  17. 1 row created.

  19. SCOTT@proc> insert into tt values(3,rpad('c',1800,'+'));

  21. 1 row created.

  23. SCOTT@proc> insert into tt values(4,rpad('d',1800,'+'));

  25. 1 row created.

  27. SCOTT@proc> commit;

  29. Commit complete.

  31. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;

  33.         ID SU ROWID                   FILE#     BLOCK#       ROW#

  34. ---------- -- ------------------ ---------- ---------- ----------

  35.          1 a   AAAV8LAAEAAAAImAAA           4          550          0

  36.          2 b   AAAV8LAAEAAAAImAAB           4          550          1

  37.          3 c   AAAV8LAAEAAAAImAAC           4          550          2

  38.          4 d   AAAV8LAAEAAAAImAAD           4          550          3

  40. SCOTT@proc> delete from tt where id=2;

  42. 1 row deleted.

  44. SCOTT@proc> commit;

  46. Commit complete.

  48. SCOTT@proc> insert into tt values(5,rpad('e',1800,'+'));

  50. 1 row created.

  52. SCOTT@proc> commit;

  54. Commit complete.

  56. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;

  58.         ID SU ROWID                   FILE#     BLOCK#       ROW#

  59. ---------- -- ------------------ ---------- ---------- ----------

  60.          1 a  AAAV8LAAEAAAAImAAA           4          550          0

  61.          5 e   AAAV8LAAEAAAAImAAB           4        550          1

  62.          3 c   AAAV8LAAEAAAAImAAC           4          550          2

  63.          4 d   AAAV8LAAEAAAAImAAD          4          550          3


环境2：

  1. SCOTT@proc> drop table tt purge;


  3. Table dropped.


  5. SCOTT@proc> create table tt (id int,name varchar2(2000)) tablespace users;


  7. Table created.


  9. SCOTT@proc> insert into tt values(1,rpad('a',1800,'+'));


  11. 1 row created.


  13. SCOTT@proc> insert into tt values(2,rpad('b',1800,'+'));


  15. 1 row created.


  17. SCOTT@proc> insert into tt values(3,rpad('c',1800,'+'));


  19. 1 row created.


  21. SCOTT@proc> commit;


  23. Commit complete.


  25. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;


  27.         ID SU ROWID                   FILE#     BLOCK#       ROW#

  28. ---------- -- ------------------ ---------- ---------- ----------

  29.          1 a   AAAV8VAAEAAAAIkAAA           4          548          0

  30.          2 b   AAAV8VAAEAAAAIkAAB          4          548          1

  31.          3 c  AAAV8VAAEAAAAIkAAC          4          548          2


  33. SCOTT@proc> delete from tt where id=2;


  35. 1 row deleted.


  37. SCOTT@proc> insert into tt values(4,rpad('d',1800,'+'));


  39. 1 row created.


  41. SCOTT@proc> commit;


  43. Commit complete.


  45. SCOTT@proc> insert into tt values(5,rpad('e',1800,'+'));


  47. 1 row created.


  49. SCOTT@proc> commit;


  51. Commit complete.


  53. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;


  55.         ID SU ROWID                   FILE#     BLOCK#       ROW#

  56. ---------- -- ------------------ ---------- ---------- ----------

  57.          1 a   AAAV8VAAEAAAAIkAAA          4          548          0

  58.          3 c  AAAV8VAAEAAAAIkAAC           4         548          2

  59.          4 d  AAAV8VAAEAAAAIkAAD           4          548          3

  60.          5 e  AAAV8VAAEAAAAIkAAE          4         548          4


  62. SCOTT@proc>


环境3：

  1. SCOTT@proc> drop table tt purge;

  3. Table dropped.

  5. SCOTT@proc> create table tt (id int,name varchar2(2000)) tablespace users;

  7. Table created.

  9. SCOTT@proc> insert into tt values(1,rpad('a',1800,'+'));

  11. 1 row created.

  13. SCOTT@proc> insert into tt values(2,rpad('b',1800,'+'));

  15. 1 row created.

  17. SCOTT@proc> insert into tt values(3,rpad('c',1800,'+'));

  19. 1 row created.

  21. SCOTT@proc> commit;

  23. Commit complete.

  25. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;

  27.         ID SU ROWID                   FILE#     BLOCK#       ROW#

  28. ---------- -- ------------------ ---------- ---------- ----------

  29.          1 a  AAAV8MAAEAAAAImAAA          4          550          0

  30.          2 b  AAAV8MAAEAAAAImAAB          4         550          1

  31.          3 c   AAAV8MAAEAAAAImAAC          4          550          2

  33. SCOTT@proc> delete from tt where id=2;

  35. 1 row deleted.

  37. SCOTT@proc> commit;

  39. Commit complete.

  41. SCOTT@proc> insert into tt values(4,rpad('d',1800,'+'));

  43. 1 row created.

  45. SCOTT@proc> insert into tt values(5,rpad('e',1800,'+'));

  47. 1 row created.

  49. SCOTT@proc> commit;

  51. Commit complete.

  53. SCOTT@proc> select id,substr(name,1,1),rowid,dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,dbms_rowid.rowid_row_number(rowid) row# from tt;

  55.         ID SU              ROWID      FILE#     BLOCK#       ROW#

  56. ---------- -- ------------------ ---------- ---------- ----------

  57.          1 a   AAAV8MAAEAAAAImAAA           4          550          0

  58.          5 e   AAAV8MAAEAAAAImAAB           4          550          1

  59.          3 c   AAAV8MAAEAAAAImAAC           4          550          2

  60.          4 d   AAAV8MAAEAAAAImAAD           4          550          3

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