Look at an example of a subquery, which is a query that is nested in a SELECT, INSERT, UPDATE, or DELETE statement, or inside another subquery in SQL Server. A subquery is also called an inner query ...

In this article, I’ll discuss some of the more frequently used methods for consolidating data from multiple tables into a single result set: SELECT, JOIN, UNION and subqueries.

It might be possible to split the SQL up into parts and get the lineage for each CTE. Afterwards you can then deduct the actual lineage from the actual source tables to the target. If this is not ...

Do you want to find out how to avoid duplicates in the results of a SQL SELECT query? This article will show you how. To avoid duplicate results: Simply use the DISTINCT clause and between the SELECT ...

With FromSql, the items in your Select clause must use the column names that properties are mapped to. Using my previous example, that means the Select clause in my SQL statement must include an item ...

By understanding the difference between IN, EXISTS, NOT IN, and NOT EXISTS, you can avoid a very common problem when NULLs appear in the data of a subquery. Scott Stephens helps you understand ...