Index ms slow sql updating
This SQL Server index design guide contains information on index architecture, and best practices to help you design effective indexes to meet the needs of your application.
This guide assumes the reader has a general understanding of the index types available in SQL Server.
Wide indexes, on the other hand, cover more queries.
You may have to experiment with several different designs before finding the most efficient index.
Do not always equate index usage with good performance, and good performance with efficient index use.
If using an index always helped produce the best performance, the job of the query optimizer would be simple.
When you design an index, consider the following database guidelines: The term SARGable in relational databases refers to a Search ARGument-able predicate that can leverage an index to speed up the execution of the query.
By default, indexes are stored in the same filegroup as the base table on which the index is created.An index is an on-disk or in-memory structure associated with a table or view that speeds retrieval of rows from the table or view.An index contains keys built from one or more columns in the table or view.Indexes can be added, modified, and dropped without affecting the database schema or application design.Therefore, you should not hesitate to experiment with different indexes.