Sql updating multiple tables
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SQL Server can only make use of one spatial index in a join between tables, so there’s no need to add an index to both tables. In this case, it is better to explicitly define a clustered or non-clustered index that could be configured as a non-unique index.Adding indexes to the temporary tables will enhance its performance if the index is chosen correctly, otherwise, it can cause performance degradation.SQL Server Temporary tables are a special type of tables that are written to the Temp DB database and act like regular tables, providing a suitable workplace for intermediate data processing before saving the result to a regular table, as it can live only for the age of the database connection.
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