CST(46)-Refresh and Updates

The informational databases are populated with data that originates from the various productions databases. Typically, the data is copied or...

The informational databases are populated with data that originates from the various productions databases. Typically, the data is copied or extracted using one of two techniques:
  • Refresh replaces the entire target with data from the source. This works well when you are moving small amounts small amounts of data, which have low requirements for frequency of update (that is, the data has low volatility). It is also used for doing initial bulk loads to the target database.
  • Update only sends the changed data to the target. Updates can be either synchronous, which means that the target copy is updated in the same commit scope as the source table, or they can be asynchronous, which means that the target table is updated in a separate transaction that the one updating the source. Synchronous updates are useful in production environments for creating replicated databases that provide high availability. Asynchronous updates are useful in data warehousing situations. You get to specify the level of synchronization that you want to maintain between the source and the target and the interval of updates. This means that you get to control the level of data obsolescence you can tolerate. 

Best Online Tutorials | Source codes | Programming Languages: CST(46)-Refresh and Updates
CST(46)-Refresh and Updates
Best Online Tutorials | Source codes | Programming Languages
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content