Stunning Tips About How To Check Table Statistics In Oracle

Sql> select num_rows, last_analyzed from user_ind_statistics where index_name ='test_idx';

How to check table statistics in oracle. How to check if table stats is locked: Check the table stale statistics. In my setup stats was only running for one user so this worked very well.

This can only be found out if table monitoring is enabled (which is by default as of 10g, but not in 9i). To verify that the table statistics are available, execute the following statement against dba_tables: When in doubt,sqls can be used to check the last update statistics collection time.

What are statistics in oracle? By default statistics_level is set to typical and monitoring of tables is enabled. Select stale_stats from dba_tab_statistics where.

Number of rows in table. Optimizer statistics are a collection of data that describe the database, and the objects in the database. What is the detail level of statistics collected.

If dbms_stats gathers statistics for a table, and if queries have referenced the columns in this table, then oracle database creates histograms automatically as needed according to the. To see if oracle thinks the statistics on your table are stale, you want to look at the stale_stats column in dba_statistics. For tables, the following information is retrieved:

You can get all necessary information from the. It is strongly recommended to set statistics_level to typical in 10g and above. These statistics are used by the optimizer to.