Structured Query Language (SQL) Anon-procedural language (Cheap web hosting) that does not
Structured Query Language (SQL) Anon-procedural language that does not allow dependencies between successive commands. SQL is the language used to access data in a relational database. Generally, for any relational database other than Microsoft SQL-Server, SQL is pronounced ess-queue-ell and not sequel. Surrogate key Used as a replacement or substitute for a descriptive primary key, allowing for better control, better structure, less storage space, more efficient indexing, and absolute surety of uniqueness. Surrogate keys are usually integers, and usually automatically generated using auto counters or sequences. Table An entity that is divided into fields and records. Fields impose structure and datatype specifics onto each of the field values in a record. Tertiary index See Alternate index. Time dimension Used for temporal analysis in data warehouses. Timeline For a project plan, a plotting of who does what and when. A project plan and timeline are useful 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. Timestamp A datatype used to store date values, with a time of day attached as well. Transaction In SQL, a sequence of one or more commands where changes are not as yet committed permanently to a database. A transaction is completed once changes are committed or undone (rolled back). Transactional control A transaction is comprised of one or more database change commands, which make database changes. Atransaction is completed on the execution of a COMMIT or ROLLBACK command, manually or automatically. The concept of transactional control is that SQL allows sets of commands to be permanently stored all at once, or undone all at once. Transactional data Data about the day-to-day dynamic activities of a company, such as invoices. Transitive dependence Z is transitively dependent on X when X determines Y and Y determines Z. Transitive dependence thus describes that Z is indirectly dependent on X through its relationship with Y. Trigger A chunk of code that executes when a specified event occurs, usually before or after an INSERT, UPDATE, or DELETE command. Trivial multi-valued dependency A multi-valued dependency with only two fields in the table. (See Multi valued dependency.) Truncate A term implying the removal of characters from a value, typically a number, where no rounding occurs. Tuple See Record. 418 Glossary
Looking for affordable and reliable webhost to host and run your business application? Then look no more and go to servlet web hosting services.