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  2. Group by (SQL) - Wikipedia

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

    A GROUP BY statement in SQL specifies that a SQL SELECT statement partitions result rows into groups, based on their values in one or several columns. Typically, grouping is used to apply some sort of aggregate function for each group. [1] [2] The result of a query using a GROUP BY statement contains one row for

  3. Correlated subquery - Wikipedia

    en.wikipedia.org/wiki/Correlated_subquery

    In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. This can have major impact on performance because the correlated subquery might get recomputed every time for each row of the outer query is processed.

  4. Select (SQL) - Wikipedia

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

    SELECT list is the list of columns or SQL expressions to be returned by the query. This is approximately the relational algebra projection operation. AS optionally provides an alias for each column or expression in the SELECT list. This is the relational algebra rename operation. FROM specifies from which table to get the data. [3]

  5. Virtual column - Wikipedia

    en.wikipedia.org/wiki/Virtual_column

    In relational databases a virtual column is a table column whose value(s) is automatically computed using other columns values, or another deterministic expression. Virtual columns are defined of SQL:2003 as Generated Column, [1] and are only implemented by some DBMSs, like MariaDB, SQL Server, Oracle, PostgreSQL, SQLite and Firebird (database server) (COMPUTED BY syntax).

  6. Appeals court scraps Nasdaq boardroom diversity rules in ...

    www.aol.com/appeals-court-scraps-nasdaq...

    A federal appeals court blocked Nasdaq rules to increase boardroom diversity, saying that the Securities and Exchange Commission did not have the authority to approve them.. Wednesday’s ruling ...

  7. 11 benefits of chia seeds from gut health to weight loss - AOL

    www.aol.com/finance/11-benefits-chia-seeds-gut...

    Chia seeds are tiny and round, and come in colors like black, brown, and white. They’re a member of the mint family. (Getty Images)

  8. DUAL table - Wikipedia

    en.wikipedia.org/wiki/DUAL_table

    Several other databases (including Microsoft SQL Server, MySQL, PostgreSQL, SQLite, and Teradata) enable one to omit the FROM clause entirely if no table is needed. This avoids the need for any dummy table. ClickHouse has a one-row system table system.one with a single column named "dummy" of type UInt8 and value 0. This table is implicitly ...

  9. Baby Animals 101: Fun Names and Surprising Facts - AOL

    www.aol.com/baby-animals-101-fun-names-060600027...

    While most people know that a baby dog is called a puppy, many may not know what a baby elephant is called. In this fun infographic, explore the world of baby animals. Find out what they’re ...