Indexes
In SQL Server 2008, indexes are used to improve the performance of queries by providing faster access to data. An index is essentially a data structure that stores a copy of a portion of a database table or view’s data, sorted and organized in a way that allows for more efficient searching and retrieval of specific rows or sets of rows.
There are several types of indexes that can be used in SQL Server 2008, including clustered and nonclustered indexes. Clustered indexes determine the physical order of data in a table, while nonclustered indexes provide a separate copy of a table’s data in a different order.
Creating an index in SQL Server 2008 involves specifying the table or view on which the index will be built, as well as the columns that will be included in the index. It’s important to carefully consider which columns to include in an index, as too many indexes or poorly designed indexes can actually harm query performance. Overall, indexes are a critical tool for optimizing the performance of SQL Server 2008 databases and should be used strategically and thoughtfully to ensure the best possible query performance.
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