What are some open research questions in the field of columnar databases?

Mar 5, 2025 ... Columnar Storage: Parquet is designed for read-heavy, analytical ... data lake storage, where analytics tools like Apache Spark and Presto thrive. An estimate is only as good as the information it is based on, and the NECA Manual of Labor Units (MLU) has been the estimating resource of choice for ... Apr 21, 2022 ... I have been using MySQL to store economic time series data for my own analytics (local PC host). I have been told that a columnar database such ... There are a few convenience wrappers for various informational SQL queries (like drill_version() ). ... drill_uplift : Turn a columnar query results into a type- ... Jan 13, 2023 ... What Is A Transactional Database? Transactional data is information captured from day-to-day business activities such as sales, discounts, ... Operational reporting differs from informational reporting in that its scope is on day-to-day operations and thus requires data on the detail of individual ... May 16, 2024 ... What is a transactional database? · ACID properties compliance: Transactional databases are designed to be ACID compliant, which stands for ... AIX Administration. - · Advanced COBOL Programming. CSI406 · Algorithms and Data Structures. CSI403 · Automata & Formal Languages. CSI409 · Business Law. LAW220 ... Apr 8, 2025 ... Alters the schema or properties of a table. For type changes or renaming columns in Delta Lake see rewrite the data. Dec 20, 2024 ... Data decay refers to the gradual degradation of data quality over time, often due to outdated information or system incompatibilities. It ...