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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 a variety of file formats such as simple row-oriented CSV and JSON data files to more performant open column-oriented data file formats like ORC or Parquet [2] [3] residing on different storage systems like ...
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).
A common table expression, or CTE, (in SQL) is a temporary named result set, derived from a simple query and defined within the execution scope of a SELECT, INSERT, UPDATE, or DELETE statement. CTEs can be thought of as alternatives to derived tables ( subquery ), views , and inline user-defined functions.
HeidiSQL is a free and open-source administration tool for MariaDB, MySQL, as well as Microsoft SQL Server, PostgreSQL and SQLite. Its codebase was originally taken from Ansgar Becker's own MySQL-Front 2.5 software. After selling the MySQL-Front branding to an unrelated party, Becker chose "HeidiSQL" as a replacement.
Project Athena was a joint project of MIT, Digital Equipment Corporation, and IBM to produce a campus-wide distributed computing environment for educational use. [1] It was launched in 1983, and research and development ran until June 30, 1991.
When an object is created, a pointer to this table, called the virtual table pointer, vpointer or VPTR, is added as a hidden member of this object. As such, the compiler must also generate "hidden" code in the constructors of each class to initialize a new object's virtual table pointer to the address of its class's virtual method table.
The Erechtheion [2] (/ ɪ ˈ r ɛ k θ i ə n /, latinized as Erechtheum / ɪ ˈ r ɛ k θ i ə m, ˌ ɛ r ɪ k ˈ θ iː ə m /; Ancient Greek: Ἐρέχθειον, Greek: Ερέχθειο) or Temple of Athena Polias [3] is an ancient Greek Ionic temple on the north side of the Acropolis, Athens, which was primarily dedicated to the goddess ...
Plan of the Temple of Athena of Syracuse. The Athenaio was a peripteral temple with six columns on the short sides and fourteen on the long sides. On the front, the intercolumniation at either edge was reduced, the canonical solution to issues of perspective. In total, the building was 22 metres wide and 55 metres long.