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SQLAlchemy is an open-source Python library that provides an SQL toolkit (called "SQLAlchemy Core") and an Object Relational Mapper (ORM) for database interactions. It allows developers to work with databases using Python objects, enabling efficient and flexible database access.
TurboGears 2.x uses CherryPy as server and SQLAlchemy as its default ORM. [16] SQLObject — a popular ORM for providing an object interface to a database. Supports a number of common database backends: included in the distribution are MySQL, PostgreSQL, SQLite, Sybase SQL Server, MaxDB, Microsoft SQL Server and Firebird. TurboGears 1.x uses ...
There are graphical and command line utilities in Windows, Linux, and Mac OS X environments. Zen Control Center (CC) is the main utility that enables the user to create and manipulate databases and tables, to access servers and clients, to set configurations and properties, and to edit data. Through CC, the user can access a series of other ...
That is the domain of the physical schema. Now logical schemas describe data in terms of relational tables and columns , object-oriented classes , and XML tags . A single set of tables, for example, can be implemented in numerous ways, up to and including an architecture where table rows are maintained on computers in different countries.
The SQL/Schemata, or Information and Definition Schemas, part of the SQL standard is defined by ISO/IEC 9075-11:2008.SQL/Schemata defines the information schema and definition schema, providing a common set of tools to make SQL databases and objects self-describing.
The primary front-end for PostgreSQL is the psql command-line program, which can be used to enter SQL queries directly, or execute them from a file. In addition, psql provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating a wide variety of tasks; for example tab completion of object names ...
From January 2008 to December 2012, if you bought shares in companies when Lester L. Lyles joined the board, and sold them when he left, you would have a -21.9 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
A logical data model or logical schema is a data model of a specific problem domain expressed independently of a particular database management product or storage technology (physical data model) but in terms of data structures such as relational tables and columns, object-oriented classes, or XML tags.