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  2. Cardinality (SQL statements) - Wikipedia

    en.wikipedia.org/wiki/Cardinality_(SQL_statements)

    An example of a data table column with low-cardinality would be a CUSTOMER table with a column named NEW_CUSTOMER. This column would contain only two distinct values: Y or N, denoting whether the customer was new or not. Since there are only two possible values held in this column, its cardinality type would be referred to as low-cardinality. [2]

  3. Select (SQL) - Wikipedia

    en.wikipedia.org/wiki/Select_(SQL)

    SQL includes operators and functions for calculating values on stored values. SQL allows the use of expressions in the select list to project data, as in the following example, which returns a list of books that cost more than 100.00 with an additional sales_tax column containing a sales tax figure calculated at 6% of the price .

  4. Query optimization - Wikipedia

    en.wikipedia.org/wiki/Query_optimization

    In such cases, alternative query plans must be compared in terms of their execution time but also in terms of the precision or reliability of the data they generate. Multi-objective query optimization [ 10 ] models the cost of a query plan as a cost vector where each vector component represents cost according to a different cost metric.

  5. Trino (SQL query engine) - Wikipedia

    en.wikipedia.org/wiki/Trino_(SQL_query_engine)

    Trino is an open-source distributed SQL query engine designed to query large data sets distributed over one or more heterogeneous data sources. [1] Trino can query data lakes that contain open column-oriented data file formats like ORC or Parquet [2] [3] residing on different storage systems like HDFS, AWS S3, Google Cloud Storage, or Azure Blob Storage [4] using the Hive [2] and Iceberg [3 ...

  6. Lookup table - Wikipedia

    en.wikipedia.org/wiki/Lookup_table

    In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation, in a process termed as direct addressing.The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input/output operation. [1]

  7. Trump advisers seek to shrink or eliminate bank regulators ...

    www.aol.com/news/trump-advisers-seek-shrink...

    Trump has named two entrepreneurs - Elon Musk and former Republican presidential candidate Vivek Ramaswamy to the task force that plans a sweeping overhaul of the U.S. government, which spent $6.8 ...

  8. Relational calculus - Wikipedia

    en.wikipedia.org/wiki/Relational_calculus

    The raison d'être of the relational calculus is the formalization of query optimization.Query optimization consists in determining from a query the most efficient manner (or manners) to execute it.

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