In a relational database, joins across tables are the logical corollary to designing normalized schemas. In contrast, the SQL API uses the denormalized data model of schema-free items, which is the ...

# A query to find the top 5 customers in the top 10 cities who have paid the highest total amounts to Rockbuster INNER JOIN rental F ON A.customer_id = F.customer_id INNER JOIN payment E ON ...

During optimization, the cardinality estimation process is responsible for estimating the number of rows processed at each step in an execution plan. Cardinality estimation uses a combination of ...

When you import data from a relational database like SQL Server in Power BI you have the option of entering your own SQL query to use as a starting point: Here’s the M code for a query that does this: ...

Part of the SQL Server 2022 blog series. Query Store is one of the most powerful database-scoped features in SQL Server for troubleshooting performance and improving the stability of your database ...