Operating system The lowest level of software on a (Web design tools)
Operating system The lowest level of software on a computer, generally managing the interface and the hardware. Windows, UNIX, and Linux are all operating systems. Operations A term describing what a company does to make a profit. Optimizer A term applied to a process, within a database engine, that attempts to find the fastest method of executing a SQL command against a database. ORDER BY clause Query SELECT command adjustment allowing resorting (reordering) of records as they are returned from a query to a database. Outer join An intersection plus rows outside the intersection, in one table and not in the other table of a join. Overflow A situation where new data is added to a table or index, but outside of the most effective structure, making subsequent reads potentially very inefficient. Certain types of indexes are subject to overflow. Paper trail The pieces of paper a company produces, and those passing through it, while it conducts its day-to-day affairs. A company in the process of performing its day-to-day business is likely to have a paper trail of orders, invoices, bills, checks, and so on. Analysis can gain copious amounts of information from a company paper trail. Following the paper trail is a very useful method of gathering analytical details of the business operational processes of a company. Parallel processing Execution of more than one thing at the same time, typically using multiple CPUs (but not always). Additionally, parallel processing used in hand with partitioning can result in some very effective performance improvements. Partitioning Physical splitting of tables into separate sections (partitions), including parallel processing on multiple partitions and individual operations on individual partitions. One particularly efficient aspect is the capability when querying a table to read fewer than all the partitions making up a table, perhaps even a single partition. This is also known as partition pruning. Performance Performance is a measure of how fast a database services applications, and ultimately end-users. Planning A process whereby a project plan and timeline are used for larger projects. Project plans typically include, who does what and when. More sophisticated plans integrate multiple tasks, sharing them out among many people, ensuring dependencies are catered for. For example, if task B requires completion of task A, the same person can do both tasks A and B. If there is no dependency, two people can do both tasks A an B at the same time. Power-user A user who is between an end-user and an expert computer programmer, in terms of knowing how to use a computer. An end-user uses a computer as a tool to solve business problems. A computer programmer writes the software that end-users make use of. A power user is someone in between, typically an end-user who writes his or her own software. Precedence The order of resolution of an expression, and generally acts from left to right, across an expression. 415 Glossary
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