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A database administrator (DBA) manages computer databases. [1] The role may include capacity planning , installation , configuration , database design , migration , performance monitoring, security , troubleshooting , as well as backup and data recovery .
There are three types of DBAs: Systems DBAs (also referred to as physical DBAs, operations DBAs or production Support DBAs): focus on the physical aspects of database administration such as DBMS installation, configuration, patching, upgrades, backups, restores, refreshes, performance optimization, maintenance and disaster recovery.
The average wage is a measure of total income after taxes divided by total number of employees employed. In this article, the average wage is adjusted for living expenses "purchasing power parity" (PPP).
In 2013, 50% of minimum wage workers were between the ages of 15 and 19; in 1997, it was 36%. 50.2% of workers in this age group were paid minimum wage in 2013, an increase from 31.5% in 1997. Statistics Canada notes that "youth, women and persons with a low level of education were the groups most likely to be paid at minimum wage." [2]
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A range query is a common database operation that retrieves all records where some value is between an upper and lower boundary. [1] For example, list all employees with 3 to 5 years' experience. Range queries are unusual because it is not generally known in advance how many entries a range query will return, or if it will return any at all.
12.2.0.1 March 2017 Native Sharding, Zero Data Loss Recovery Appliance, Exadata Cloud Service, Cloud at Customer Oracle Database 12c Release 1 12.1.0.1 July 2013 [21] 12.1.0.2 July 2014 Multitenant architecture, In-Memory Column Store, Native JSON, SQL Pattern Matching, Database Cloud Service
Note (9): Despite the lack of a date datatype, SQLite does include date and time functions, [83] which work for timestamps between 24 November 4714 B.C. and 1 November 5352. Note (10): Informix DATETIME type has adjustable range from YEAR only through 1/10000th second. DATETIME date range is 0001-01-01 00:00:00.00000 through 9999-12-31 23:59:59 ...