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DATA PROCESSINGData processing cycle Methods of data collection Stages of data collection Description of errors in data processing
Data integrity
Threat to data integrity
Data processing methods
Computer files
Elements of computer file
Logical and physical files
Types of Computer Processing Files
A transaction file is used to hold data during transaction processing. The file is later used to update the master file and audit daily, weekly or monthly transactions. For example in a busy supermarket, daily sales are recorded on a transaction file and later used to update the stock file. The file is also used by the management to check on the daily or periodic transactions. Reference file A reference file is mainly used for reference or look-up purposes. Look-up information is that information that is stored in a separate file but is required during processing. For example, in a point of sale terminal, the item code entered either manually or using a barcode reader looks up the item description and price from a reference file stored on a storage device. Backup file A backup files is used to hold copies (backups) of data or information from the computers fixed storage (hard disk). Since a file held on the hard disk may be corrupted, lost or changed accidentally, it is necessary to keep copies of the recently updated files. Incase of the hard disk failure, a backup file can be used to reconstruct the original file. Report file Used to store
relatively permanent records extracted from the master file or generated after processing. For example you may obtain a stock levels report generated from an inventory system while a copy of the report will be stored in the report file.
File organization methods
Advantages of sequential file organization
Disadvantages of sequential file organization
Advantages of random file access
Advantages of serial file organization
Disadvantages of serial file organization
Electronic data processing methods
Peda.net käyttää vain välttämättömiä evästeitä istunnon ylläpitämiseen ja anonyymiin tekniseen tilastointiin. Peda.net ei koskaan käytä evästeitä markkinointiin tai kerää yksilöityjä tilastoja. Lisää tietoa evästeistä What is the process of converting data from one type to another?Data transformation is the technical process of converting data from one format, standard, or structure to another – without changing the content of the datasets – typically to prepare it for consumption by an app or a user or to improve the data quality.
What is the process of converting data into information?The process of converting data into information is called data processing. Hence, data is raw material ... Data processing starts with data in its raw form and converts it into a more readable format (graphs, documents, etc.
What are some of the benefit of using SQL for analysis?The following are some of the advantages of utilizing SQL:. Faster and Efficient Query Processing. SQL works with an efficient speed. ... . No Need for Coding Skills. ... . Portable. ... . Standardized Language. ... . Interactive Language. ... . Multiple Data Views. ... . Internet Usage. ... . Large User Community.. |