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Alter session set events’10053 trace name context forever[,level {1/2}]’;
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SYS.DBMS_SYSTEM.SET_EV (<sid>, <serial#>, 10053, {1|2}, '')
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SYS.DBMS_SYSTEM.SET_EV (<sid>, <serial#>, 10053,0, '')
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BASE STATISTICAL INFORMATION
***************************************
Table stats    Table: TEST   Alias: TEST
  TOTAL ::  CDN: 999  NBLKS:  13  AVG_ROW_LEN:  86
-- Index stats
  INDEX NAME: IDX_OBJECT_ID  COL#: 4
    TOTAL ::  LVLS: 1   #LB: 3  #DK: 999  LB/K: 1  DB/K: 1  CLUF: 582
_OPTIMIZER_PERCENT_PARALLEL = 0
***************************************
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Trace label            dba_tables column               describe
CDN                      NUM_ROWS                          The cardinality = number of rows of the table
NBLKS        &nbs


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