September 2023
Intermediate to advanced
240 pages
7h 40m
English
book
The AWK Programming Language, 2nd Edition
by Alfred V. Aho, Brian W. Kernighan, Peter J. Weinberger
Content preview from The AWK Programming Language, 2nd Edition
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5
Reports and Databases
This chapter shows how Awk can be used to extract information and generate reports from data stored in files. The emphasis is on tabular data, but the techniques apply to more complex forms as well. The theme is the development of programs that can be used with one another. We will see a number of common data-processing problems that are hard to solve in one step, but easily handled by making several passes over the data.
The first part of the chapter deals with generating reports by scanning a single file. Although the format of the final report is of primary interest, there are complexities in the scanning too. The second part of the chapter describes one approach to collecting data from several interrelated files. ...
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