{"id":1423,"date":"2018-04-23T09:58:26","date_gmt":"2018-04-23T01:58:26","guid":{"rendered":"http:\/\/www.821121.com\/?p=1423"},"modified":"2021-03-02T10:52:15","modified_gmt":"2021-03-02T02:52:15","slug":"%e9%97%aa%e5%9b%9e%e7%89%88%e6%9c%ac%e6%9f%a5%e8%af%a2flashback-version-query%e6%a8%a1%e6%8b%9f%e6%b5%8b%e8%af%95","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1423","title":{"rendered":"\u95ea\u56de\u7248\u672c\u67e5\u8be2(Flashback version query)\u6a21\u62df\u6d4b\u8bd5"},"content":{"rendered":"
Flashback version query \u5141\u8bb8\u67e5\u770b\u76f8\u540c\u884c\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u6240\u6709\u7684\u7248\u672c\uff0c\u8bb0\u5f55\u4e86\u6570\u636e\u7684\u5386\u53f2\u53d8\u5316\u8fc7\u7a0b\u3002\u4f7f\u7528Flashback Version Query  \u8fd4\u56de\u5728\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\u6216SCN\u95f4\u9694\u5185\u7684\u6240\u6709\u7248\u672c\uff0c\u4e00\u6b21commit\u547d\u4ee4\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u7248\u672c<\/code><\/pre>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a\n\nSELECT .....FROM tablename VERSIONS {BETWEEN {SCN | TIMESTAMP} start AND end} \n\n--start,end\u53ef\u4ee5\u662f\u65f6\u95f4\u4e5f\u53ef\u4ee5\u662fscn\nFlashback Version Query\u4f2a\u5217\u8bf4\u660e\nversions_start{scn|time}  \u7248\u672c\u5f00\u59cb\u7684scn\u6216\u65f6\u95f4\u6233\nversions_end{scn|time}  \u7248\u672c\u7ed3\u675fscn\u6216\u65f6\u95f4\u6233\uff0c\u5982\u679c\u6709\u503c\u8868\u660e\u6b64\u884c\u540e\u9762\u88ab\u66f4\u6539\u8fc7\u662f\u65e7\u7248\u672c\uff0c\u5982\u679c\u4e3anull\uff0c\u5219\u8bf4\u660e\u884c\u7248\u672c\u662f\u5f53\u524d\u7248\u672c\u6216\u884c\u88ab\u5220\u9664\uff08\u5373versions_operation\u503c\u4e3aD\uff09\u3002\nversions_xid \u521b\u5efa\u884c\u7248\u672c\u7684\u4e8b\u52a1ID\nversions_operation  \u5728\u884c\u4e0a\u6267\u884c\u7684\u64cd\u4f5c\uff08I=\u63d2\u5165\uff0cD=\u5220\u9664\uff0cU=\u66f4\u65b0\uff09<\/code><\/pre>\n
\u793a\u4f8b\u8bf4\u660e\uff1a\n\nSQL> create table xyc_t1 as select * from scott.emp where 1=2;  --\u521b\u5efa\u8868xyc_t1\n\nTable created.\n\nSQL> select to_date(sysdate,'YYYY-MM-DD HH24:MI:SS') from dual; --\u67e5\u8be2\u65f6\u95f4\u4f5c\u4e3atimestamp\u5f00\u59cb\u65f6\u95f4\n\nTO_DATE(SYSDATE,'\n-----------------\n20210121 15:59:56\n\nSQL> insert into xyc_t1 select * from scott.emp where empno=7902;   --\u63d2\u5165empno=7902\n\n1 row created.\n\nSQL> commit;                                                                               --\u63d2\u5165\u4e00\u884c\u63d0\u4ea4\u4f5c\u4e3a\u4e00\u4e2a\u7248\u672c\n\nCommit complete.\n\nSQL> select to_date(sysdate,'YYYY-MM-DD HH24:MI:SS') from dual;\n\nTO_DATE(SYSDATE,'\n-----------------\n20210121 16:00:19\n\nSQL> insert into xyc_t1 select * from scott.emp where empno=7788;\n\n1 row created.\n\nSQL> insert into xyc_t1 select * from scott.emp where empno=7698;\n\n1 row created.\n\nSQL> commit;                                                                             --\u63d2\u5165\u4e24\u884c\u63d0\u4ea4\u4f5c\u4e3a\u4e00\u4e2a\u7248\u672c\n\nCommit complete.\n\nSQL> select to_date(sysdate,'YYYY-MM-DD HH24:MI:SS') from dual;\n\nTO_DATE(SYSDATE,'\n-----------------\n20210121 16:00:53\n\nSQL> update xyc_t1 set sal=8888 where empno=7788;\n\n1 row updated.\n\nSQL> commit;                                                                          --\u518d\u6b21\u66f4\u6539empno=7788\u7684\u884c\u63d0\u4ea4\uff0c\u4f7f\u8fd9\u884c\u6709\u65e7\u7248\u672c\n\nCommit complete.\n\nSQL> select to_date(sysdate,'YYYY-MM-DD HH24:MI:SS') from dual; --\u67e5\u8be2\u65f6\u95f4\u4f5c\u4e3atimestamp\u7ed3\u675f\u65f6\u95f4\n\nTO_DATE(SYSDATE,'\n-----------------\n20210121 16:01:18\n\nselect versions_startscn,versions_starttime,versions_endscn,versions_endtime,versions_xid,versions_operation,empno\nfrom xyc_t1 versions between timestamp to_timestamp('20210121 15:59:56','YYYY-MM-DD HH24:MI:SS') and to_timestamp('20210121 16:01:18','YYYY-MM-DD HH24:MI:SS');\n\nSQL> set line 9999\nSQL> select versions_startscn,versions_starttime,versions_endscn,versions_endtime,versions_xid,versions_operation,empno\n  2  from xyc_t1 versions between timestamp to_timestamp('20210121 15:59:56','YYYY-MM-DD HH24:MI:SS') and to_timestamp('20210121 16:01:18','YYYY-MM-DD HH24:MI:SS');\n\nVERSIONS_STARTSCN VERSIONS_STARTTIME                                                          VERSIONS_ENDSCN VERSIONS_ENDTIME    VERSIONS_XID      V      EMPNO\n----------------- --------------------------------------------------------------------------- --------------- --------------------------------------------------------------------------- ---------------- - ----------\n          2167679 21-JAN-21 04.01.11 PM                                                                                           07001D004B040000 U        7788\n          2167669 21-JAN-21 04.00.44 PM                                                                                           06000400C9050000 I        7698\n          2167669 21-JAN-21 04.00.44 PM                                                               2167679 21-JAN-21 04.01.11 PM                                                        06000400C9050000 I       7788\n          2167490 21-JAN-21 04.00.11 PM                                                                                           0300100020050000 I        7902\n\n--\u53ef\u4ee5\u770b\u51fa\uff0c\u4e00\u6b21commit\u662f\u4e00\u4e2a\u7248\u672c\uff0c\u5f53\u524d\u7248\u672c\u7684versions_endscn\u548cversions_endtime\u503c\u4e3a\u7a7a\uff0c\u65e7\u7248\u672c\u5219\u6709\u503c\u3002\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Flashback version query \u5141<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-1423","post","type-post","status-publish","format-standard","hentry","category-oracle-11g"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1423"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1423\/revisions"}],"predecessor-version":[{"id":1424,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1423\/revisions\/1424"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1423"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1423"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}