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OracleÖÐstart with...connect by prior×Ó¾äÓ÷¨

 
OracleÖÐstart with...connect by prior×Ó¾äÓ÷¨

connect by Êǽṹ»¯²éѯÖÐÓõ½µÄ£¬Æä»ù±¾Óï·¨ÊÇ£º
select ... from tablename start with Ìõ¼þ1
connect by Ìõ¼þ2
where Ìõ¼þ3;
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select * from table
start with org_id = 'HBHqfWGWPy'
connect by prior org_id = parent_id;
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ALTER SYSTEM CHECKPOINT; ¼ä½Ó²úÉú¼ì²éµã(É趨ʵÀý»Ö¸´Ê±¼ä²»³¬¹ýmmÃë,Ò༴ִÐмì²éµãÖ®ºóÔËÐг¬¹ýÕâ¸öʱ¼ä¾ÍÔÙ´ÎÖ´Ðмì²éµã)
ALTER SYSTEM SET FAST_START_MTTR_TARGET = ÃëÊý; »ñÈ¡ÖØ×öÈÕÖ¾ÎļþÐÅÏ¢
SELECT group#, ......

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ORACLE RBA(redo byte address)

Redo Byte Address (RBA)
Recent entries in the redo thread of an Oracle instance are addressed using a 3-part redo byte address, or RBA. An RBA is comprised of
the log file sequence number (4 bytes)
the log file block number (4 bytes)
the byte offset into the block at which the redo record sta ......
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