![]() Since the optionĮQUALS is used, the order of observations remain the same in both input data set and output data set. The use of NODUPKEY option causes the elimination of observations with the same BY variable value. It is normally used with NODUPRECS or NODUPKEY and it affects which observations are removed.Įxample: In the following program the value of EQUALS option is used. The EQUALS option is used to determine the order of observations in the output data set. b) It is less efficient than sequentially reading a sorted data set as this requires retrieving the entire file to process the data.ĥ: Explain the significance of the EQUALS option.a) This requires storage space for index which results in more utilization of disk space.The main disadvantages of using BY-group processing with an index are as follows: The data view also contains information about how to retrieve the data.Ĥ: What are the main disadvantages of using BY-group processing with an index? The data view contains only descriptor information about the data and does not contain the values. Descriptor information refers to theĭetails of the data set like name of the data set, number of observations, number of variables, attributes of variables. The main difference is that SAS data file contains both descriptor information and data values. SAS data file and SAS data view are both SAS data sets. Finally, the SASFILE data file is closed with the CLOSE statement and the buffer is cleared.ģ: What is the main difference between a SAS data file and a SAS data view? It reads the file and loads it into the memory so that it is available to both the PROC PRINT as well as the PROC MEANS step. The SASFILE statement opens the data set MyExam.M圜linicĪnd allocates the buffer. The following example explains the use of SASFILE in a simple way. Instead, the file is loaded and kept in the system memory with a pointer in the program to access it. The SASFILE statement loads the SAS data file into the memory to be available further to the program. Views always fetch fresh data from the table as they do not store any data. View also lets you hide the sensitive columns and complex queries from the user by choosing only what needs to be shown. ![]() Listed below are some questions from the book:ġ:How do SQL Views help better efficiency?Ī View typically consists of a subset of the entire table and hence is more efficient as it accesses a smaller set of data which is required. This book enables you to be well prepared to ace the interview and stake your claim to fame. With the main task being cracking the interview, our book, SAS Interview Questions You’ll Most Likely Be Asked, brings to you 645 interview questions which have been thoroughly researched to give spring to your footsteps enroute this job. However, dreaming can give only a motive. With large pay figures along with proper employee care this can be the job of one’s dreams. As per studies from payscale, SAS boasts of a massive 6.1% average pay boost which makes this job profile highly valuable.Ĭognizant, Tata Consultancy Services, Accenture, GlaxoSmithKline are among the leading companies who look for professionals talented in SAS to bring value to their company by assuming the role of a SAS Programmer, Customer Analytics Manager, SAS Analyst among many. With each company racing to clock maximum sales the search for a person skilled in SAS is the need of the hour thus giving huge scope to this industry. That’s where the Statistical Analysis System comes to the scene. This has now increased competition as well and as the companies aim to maximize their profits they seek to know consumer behavior or track their profits. Globalization brought to consumers a plethora of choices to choose from in products as well as boosted e-commerce.
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