Update joins.md

Author: pmasl

docs/relational-databases/performance/joins.md

@@ -1,5 +1,5 @@
 ---
-title: "Joins | Microsoft Docs"
+title: "Joins (SQL Server) | Microsoft Docs"
 ms.custom: ""
 ms.date: "02/18/2018"
 ms.prod: "sql-non-specified"
@@ -24,7 +24,7 @@ ms.author: "mikeray"
 manager: "craigg"
 ms.workload: "On Demand"
 ---
-# Joins
+# Joins (SQL Server)
 [!INCLUDE[appliesto-ss-asdb-asdw-pdw-md](../../includes/appliesto-ss-asdb-asdw-pdw-md.md)]
 
 [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] performs sort, intersect, union, and difference operations using in-memory sorting and hash join technology. Using this type of query plan, [!INCLUDE[ssNoVersion](../../includes/ssnoversion-md.md)] supports vertical table partitioning, sometimes called columnar storage.