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How can Excel programming work
Since 1993, Excel has included Visual Basic for Applications (VBA), a programming language based on Visual Basic which adds the ability to automate tasks in Excel and to provide user defined functions (UDF) for use in worksheets. VBA is a powerful addition to Excel. Excel macros are programs that store a series of commands that you can "play back" the actions. They can reduce the number of steps required to complete tasks and significantly reduce the time users spend creating, formatting, modifying, and printing their spreadsheets. A macro can be as simple as replicating some formatting tasks or as complex as querying information from various data sources through database programming.
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How important is data quality?Data Quality refers to the quality of data. Data are of high quality "if they are fit for their intended uses in operations, decision making and planning" (J.M. Juran). Alternatively, the data are deemed of high quality if they correctly represent the real-world construct to which they refer. One industry study estimated the total cost to the US economy of data quality problems at over US$600 billion per annum (Eckerson, 2002). In fact, the problem is such a concern that companies are beginning to set up a data governance team whose sole role in the corporation is to be responsible for data quality. Although most companies tend to focus their quality efforts on name and address information, data quality is recognized as an important property of all types of data. Data quality process may include some or all of the following: Data profiling - initially assessing the data to understand its quality challenges. Data standardization - a business rules engine that ensures that data conforms to quality rules. Matching or Linking - a way to compare data so that similar but slightly different records can be aligned. Matching may use "fuzzy logic" to find duplicates in the data. It often recognizes that "Bob", "Bobby", "Rob" and 'Robert' may be the same individual. Monitoring - keeping track of data quality over time and reporting variations in the quality of data. |
Does data mining really help?Data mining uncovers patterns in data using predictive techniques. These patterns play a critical role in decision making. Using data mining, companies and organizations can increase the profitability of their businesses by uncovering opportunities and detecting potential risks. Forecasting is a component of data mining. It is the process of estimation in unknown situations. Prediction is a similar but more general term, and usually refers to estimation of time series, cross-sectional or longitudinal data. Forecasting is commonly used in discussion of time-series data. Example: One Midwest grocery chain used data mining method to analyze local buying patterns. They discovered that when men bought diapers on Thursdays and Saturdays, they also tended to buy beer. Further analysis showed that these shoppers typically did their weekly grocery shopping on Saturdays. On Thursdays, however, they only bought a few items. The retailer concluded that they purchased the beer to have it available for the upcoming weekend. The grocery chain could use this newly discovered information in various ways to increase revenue. For example, they could move the beer display closer to the diaper display. And, they could make sure beer and diapers were sold at full price on Thursdays. |
Why Database Marketing?Database marketing emphasizes the use of statistical techniques and data analyses to develop models of customer behavior, which are then used to select customers for communications. The benefit of database marketing is the ability to target your marketing efforts. Companies can concentrate their marketing effort on customers that are most likely to buy. Example: An Internet marketing company is sponsoring a trade show in Houston. Instead of sending invitations to thousands of their customers around the United States, the company runs a query in its marketing database and extracts a list of customers located in the Houston metro area. The company then sends out its invitation package to this targeted list. |