We ran the SQL tuning advisor and it produced a list of possible indexes and statistics. What the index is clear, but are those “statistics” also important to create? What do they precisely (I assume they collect data, but who uses it)?
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We ran the SQL tuning advisor and it produced a list of possible indexes and statistics. What the index is clear, but are those “statistics” also important to create? What do they precisely (I assume they collect data, but who uses it)?
The statistics is used by the query planner to determine which way is the most efficient way to get the result.
Without the statistics, the query planner only has the table layouts to use to try to determine the cost of different operations. With the statistics it can make a better prediction of the cost.