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Oracle RACѧϰ±Ê¼Ç (¶þ)

Oracle RAC Workload Management:
service   usage   preferred instances      available instances     prority         response time warning/critical
ERP        client     RDB1                            RDB2                           high            0.5/0.75
SELF_
SERVICE client    RDB1,RDB2                   -                                   standard    1.1/1.5
HOT_
BATCH    Job       RDB1                             RDB2                           high             1.0/1.5
STD_
BATCH    Job       RDB1,RDB2                   -                            &nbs


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DELETE from mytable t1 WHERE ROWID > (SELECT MIN (ROWID) from mytable t2 WHERE t1. key = t2.key);
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SELECT TO_CHAR(SYSDATE, 'yyyy-MM-dd') from DUAL;
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SELECT TO_CHAR(ADD_MONTHS(SYSDATE,
-1), 'yyyy-MM-dd') from DUAL;
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SELECT
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