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Typically, the default sampling ratio is enough to generate good execution plans. For example, my colleagues and I once had a large table with approximately 12 million records in the table.The number of records in the table was fairly static.Indexes are used to retrieve data from the database very fast.The users cannot see the indexes, they are just used to speed up searches/queries.
Manually updating the statistics may be necessary in that case.
Thanks in particular to Alan - especially as you had to type everything out twice - much appreciated...
The CREATE INDEX statement is used to create indexes in tables.
Manually updating statistics There are two ways to manually update statistics on a table.
One is via the sp_updatestats system stored procedure. While the sp_updatestats procedure is an easier way to program the command, the UPDATE STATISTICS command is much more flexible and much more powerful.
Note: Updating a table with indexes takes more time than updating a table without (because the indexes also need an update).