NUM_ROWS is blank


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Thread: NUM_ROWS is blank

  1. #1
    Les Guest

    NUM_ROWS is blank


    The NUM_ROWS column in the USER_TABLES view is blank for some tables even
    though all the tables are populated. Does anyone have an idea why?

  2. #2
    Martin Guest

    Re: NUM_ROWS is blank



    Your tables have never been ANALYZED

    ie

    ANALYZE TABLE EMP COMPUTE STATISTICS;

    Analyze is an SQLPLUS statement that produces statistical data about tables,
    indexes and clusters. These stats are then used by the cost based optimiser
    to optimise the query plan for SQL statements


    "Les" <les.wigdor@pb.com> wrote:
    >
    >The NUM_ROWS column in the USER_TABLES view is blank for some tables even
    >though all the tables are populated. Does anyone have an idea why?



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