An introduction to the Rollup Clause in SQL Server, which aggregates at several levels of a hierarchy. A population table by country, state and city shows how.
Data Mining Algorithms (Analysis Services – Data Mining)
I quite often receive requests for the Data Mining Algorithms details. Book Online has wonderful resources for the same. I suggest to read them here.
geometry STOverlaps: Intersection Alone Is Not Enough
geometry STOverlaps asks a narrower question than whether two shapes share any points. I test equal and contained regions alongside a partial overlap. Those intersecting cases do not all satisfy the method’s overlap definition.
SQL SERVER – Recompile Stored Procedure at Run Time
Two ways to recompile a stored procedure at run time in SQL Server: add WITH RECOMPILE when you create it, or ask for a one-time recompile.
Mapping MySQL Data Types to SQL Server
Mapping MySQL data types requires checking signed ranges, text encoding, date limits, and application behavior before choosing SQL Server columns.
Minimal Logging for Bulk Loads
Minimal logging for Bulk Loads depends on recovery model, table shape, and locking; learn the prerequisites, tradeoffs, and how to verify a load.
Report Caching and Snapshots in SSRS
Report caching and snapshots in SSRS reduce repeated database work when freshness rules, parameter combinations, and schedules are clear.