Search results
Results from the WOW.Com Content Network
Postgres-XC which is based on PostgreSQL provides scalable synchronous multi-master replication. [38] It is licensed under the same license as PostgreSQL. A related project is called Postgres-XL. Postgres-R is yet another fork. [39] Bidirectional replication (BDR) is an asynchronous multi-master replication system for PostgreSQL. [40]
Web2py is an open-source web application framework written in the Python programming language.Web2py allows web developers to program dynamic web content using Python.Web2py is designed to help reduce tedious web development tasks, such as developing web forms from scratch, although a web developer may build a form from scratch if required.
The central concept of a document-oriented database is the notion of a document.While each document-oriented database implementation differs on the details of this definition, in general, they all assume documents encapsulate and encode data (or information) in some standard format or encoding.
Horizontal partitioning splits one or more tables by row, usually within a single instance of a schema and a database server. It may offer an advantage by reducing index size (and thus search effort) provided that there is some obvious, robust, implicit way to identify in which partition a particular row will be found, without first needing to search the index, e.g., the classic example of the ...
A 5-year-old girl is fighting for her life at a Washington, D.C. hospital after she was shot by a younger sibling Monday evening, according to the Metropolitan Police Department.. Chief Pamela ...
"Ordered" means that the elements of the data type have some kind of explicit order to them, where an element can be considered "before" or "after" another element. This order is usually determined by the order in which the elements are added to the structure, but the elements can be rearranged in some contexts, such as sorting a list.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
For example, a transfer of funds from one bank account to another, even involving multiple changes such as debiting one account and crediting another, is a single transaction. In 1983, [ 1 ] Andreas Reuter and Theo Härder coined the acronym ACID , building on earlier work by Jim Gray [ 2 ] who named atomicity, consistency, and durability, but ...