Sql updating multiple tables


So I’ve been trying to think of some examples that make use of the Garmin POI data from my last post.Seeing as POI data naturally lends itself to nearest-neighbour queries, I thought I’d write a little about those.

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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.



Sql updating multiple tables comments


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    So I’ve been trying to think of some examples that make use of the Garmin POI data from my last post. Seeing as POI data naturally lends itself to.…