Ways to Retrieve Information

Ways to Retrieve Information

To retrieve information is one of the file processing methods, which aim to produce accurate and useful information.
• Retrieval it is the act of transferring a record from secondary storage to main memory to access data within a fields
• Insertion it is the process of adding a new record to an existing files
• Writing it is the process of transferring records from main memory to secondary storage
• Updating it makes changes to the contents of a record maintained on a file to reflect its new status
• Merging it could be a record merging or a file merging. It is a combination of two or more files in same sequence into a single output file
• Sorting it is the act of rearranging the records in a file to produce ordered reports
• Searching to satisfy specific criteria that involves looking for records with a certain key value
• Matching is to compare two or more records against other records in order to ensure that there is a complete set of records for each key. Mismatch records highlighted for subsequent action.