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Each MyISAM table is stored on disk in three files (if it is not partitioned). The files have names that begin with the table name and have an extension to indicate the file type. MySQL uses a .frm file to store the definition of the table, but this file is not a part of the MyISAM engine; instead it is a part of the server.
[6] [7] Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, [1] and "SQL", the acronym for Structured Query Language. A relational database organizes data into one or more data tables in which data may be related to each other; these relations help structure the data. SQL is a language that programmers use ...
The installed disks and their associated volumes and/or partitions can be viewed using these commands: list disk list volume list partition The sel command will select them. The command clean will perform a "quick" disk wipe, and clean all zeroes out the entire partition/disk.
Starting with version 2.0, PostGIS embeds raster support for 2-D rasters; a special function offers declarative raster query functionality. SciQL is an array query language being added to the MonetDB DBMS. SciDB is a more recent initiative to establish array database support. Like SciQL, arrays are seen as an equivalent to tables, rather than a ...
Some commands are internal—built into COMMAND.COM; others are external commands stored on disk. When the user types a line of text at the operating system command prompt, COMMAND.COM will parse the line and attempt to match a command name to a built-in command or to the name of an executable program file or batch file on disk. If no match is ...
The command is also available in FreeDOS [5] and PTS-DOS. [6] The Windows SUBST command is available in supported versions of the command line interpreter cmd.exe. [7] In Windows NT, SUBST uses DefineDosDevice() to create the disk mappings. The JOIN command is the "opposite" of SUBST, because JOIN will take a drive letter and make it appear as ...
MySQL Cluster, also known as MySQL Ndb Cluster is a technology providing shared-nothing clustering and auto-sharding for the MySQL database management system.It is designed to provide high availability and high throughput with low latency, while allowing for near linear scalability. [3]
Array: an ordered list of zero or more elements, each of which may be of any type. Arrays use square bracket notation with comma-separated elements. Object : a collection of name–value pairs where the names (also called keys) are strings.