Many people are confused by various JOIN operations supported by SQL. Learn to master the SQL command line with this crash course in JOIN syntax.

FROM table1 AS a INNER JOIN table2 AS b ON a.Id = b.Id GROUP BY b.Id, a.OtherId HAVING (COUNT(DISTINCT a.UserId) > 1) Executing this query in SQL returns results such as: ...

Practical .NET Getting All the Results When Joining with LINQ When you want to find all the objects that are missing a corresponding object, then you need the LINQ equivalent of an outer join. Here, ...

Joey on SQL Server Deep Dive into SQL Server 2022's Query Performance Features, Part 2: PSP Optimization Reduce workload times with this handy feature that can benefit every database pro.