Massively Parallel NUMA-aware Hash Joins Fast Column Scans: Paged Indices for In-Memory Column Stores -- Compiled Plans for In-Memory Path-Counting Queries -- Bringing Linear Algebra Objects to Life in a Column-Oriented In-Memory Database - Dynamic Query Prioritization for In-Memory Databases -- Aggregates Caching in Columnar In-Memory Databases -- An Evaluation of Strict Timestamp Ordering Concurrency Control for Main-Memory Database Systems -- Database Scan Variants on Modern CPUs: A Performance Study -- Efficient Transaction Processing for Hyrise in Mixed Workload Environments -- The DCB-Tree: A Space-Efficient Delta Coded Cache Conscious B-Tree -- Composite Group-Keys: Space-efficient Indexing of Multiple Columns for Compressed In-Memory Column Stores.