| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Note you need to multiply the values in the 'starts' column to those in the 'estimated' to get the value to compare to actual rows.įinal note: if you're trying to get the estimated time, explain plans include this: Then compare the estimates to the actuals and see if they're close. For instructions on how to create these, see: This shows you the number of rows processed. To figure this out, you need the execution plan. If the answer is yes for all steps of the plan, it's likely you have the 'best' plan for your query. 'Is the (estimated) cardinality roughly equal to the actual number of rows the statement processed?' The cost is useful for figuring out why the optimizer chose (e.g.) a full table scan over an index. A lower cost query can run faster than a higher cost one! Thus the cost is (usually) higher.Īll other things being equal, a query with a higher cost will use more resources and thus take longer to run. The license agreement expires upon the termination of the user’s affiliation with the University of Missouri.įor more information, call Software Sales at is the estimated number of rows the step will return.Ĭost is the estimated amount of work the plan will do.Ī higher cardinality => you're going to fetch more rows => you're going to do more work => the query will take longer. Departmental purchases must be made using a MoCode. The software must not be copied for someone else or loaned to someone else for them to copy. The Division of Information Technology will not knowingly assist in, or permit its equipment to be used in, violation of such agreements. It is the policy of the University of Missouri to honor software license agreements and to require all users to do likewise. Go to to request Toad.Īll licenses are for one year, based on the stated license period, and must be renewed annually for the new license period. UM System Departments – Columbia Campus only Toad Software is a database toolset from Quest that database developers, database administrators, and data analysts use to manage both relational and non-relational databases using SQL. License Period: September 30 – September 29

Toad for oracle cost