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A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database. The trigger is mostly used for maintaining the integrity of the information on the database. For example, when a new record (representing a new worker) is added to the employees table, new records ...
In relational databases, the log trigger or history trigger is a mechanism for automatic recording of information about changes inserting or/and updating or/and deleting rows in a database table. It is a particular technique for change data capturing , and in data warehousing for dealing with slowly changing dimensions .
This list includes SQL reserved words – aka SQL reserved keywords, [1] [2] as the SQL:2023 specifies and some RDBMSs have added. Reserved words in SQL and related products In SQL:2023 [ 3 ]
The event part specifies the signal that triggers the invocation of the rule; The condition part is a logical test that, if satisfied or evaluates to true, causes the action to be carried out; The action part consists of updates or invocations on the local data
Colin Arthur Ball, better known as Trigger, [1] is a fictional character in the BBC sitcom Only Fools and Horses and its prequel Rock & Chips. [2] He was played by Roger Lloyd-Pack in Only Fools and Horses and Lewis Osbourne in Rock & Chips. According to Del Boy, he earned the nickname Trigger because he looks like a horse.
Trigger finger, also known as stenosing tenosynovitis, is a disorder characterized by catching or locking of the involved finger in full or near full flexion, typically with force. [2] There may be tenderness in the palm of the hand near the last skin crease (distal palmar crease ). [ 3 ]
A trigger law is a law that is unenforceable but may achieve enforceability if a key change in circumstances occurs. [1] Examples. United States. Abortion
Trigger systems are necessary due to real-world limitations in computing power, data storage capacity and rates. Since experiments are typically searching for "interesting" events (such as decays of rare particles) that occur at a relatively low rate, trigger systems are used to identify the events that should be recorded for later analysis.