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dbms:oracle:concept:dblink

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dbms:oracle:concept:dblink [2010/02/24 00:46]
starlits
dbms:oracle:concept:dblink [2010/02/24 00:47] (현재)
starlits
줄 14: 줄 14:
   - The optimizer only has knowledge of local indexes when making decisions about how to execute a query.   - The optimizer only has knowledge of local indexes when making decisions about how to execute a query.
   - Remote indexes can be still be used to resolve the decomposed query sent to the remote database.   - Remote indexes can be still be used to resolve the decomposed query sent to the remote database.
-  - GROUP BY is not sent to the remote database. +  - GROUP BY is not sent to the remote database. \\ : **GROUP BY 는 원격디비에서 계산되지 않는다** 
-  - ORDER BY is not sent to the remote database.+  - ORDER BY is not sent to the remote database. \\ : **ORDER BY 는 원격디비에서 계산되지 않는다**
  
  
dbms/oracle/concept/dblink.1266939970.txt.gz · 마지막으로 수정됨: 2010/02/24 00:46 저자 starlits