An aggregate function includes values grouped together to form a single value that provides a summary of the data list.

In all versions of SQL Server to date, stored procedures written in T-SQL have been compiled into a form of intermediate language that would then be interpreted. In conjunction with SQL Server ...

So I am trying to write an update statement that uses two factors to determine the new value of the field, one of the factors is an aggregate function (COUNT). I get the error: An aggregate may ...

In addition to using subselects to examine data in related tables, it’s also possible to use an aggregate function in a WHERE clause subselect to make a determination about the primary result set.

SQL window functions provide extremely powerful and useful features that let you work with observations more easily. Different types explained here.