However in this example the order would be alphabetical returning results in Deep, Low, Mid or Mid, Low, Deep order. You can sort the results in the Description column by clicking the sort icon in Splunk Web. The search also pipes the results of the eval command into the stats command to count the number of earthquakes and display the minimum and maximum magnitudes for each Description. For example, if the depth is less than 70 km, the earthquake is characterized as a shallow-focus quake and the resulting Description is Low. The case() function is used to specify which ranges of the depth fits each description. The eval command is used to create a field called Description, which takes the value of "Low", "Mid", or "Deep" based on the Depth of the earthquake. | stats count min(mag) max(mag) by Description | eval Description=case(depth70 AND depth300, "Deep") | from my_dataset where source="all_month.csv" We'll use Low, Mid, and Deep for the category names. Deep-focus earthquakes occur at depths greater than 300 km. Mid-focus earthquakes occur at depths between 70 and 300 km. Shallow-focus earthquakes occur at depths less than 70 km. You want classify earthquakes based on depth. The data is a comma separated ASCII text file that contains magnitude (mag), coordinates (latitude, longitude), region (place), and so forth, for each earthquake recorded. This example uses earthquake data downloaded from the USGS Earthquakes website.
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This example shows you how to use the case function in two different ways, to create categories and to create a custom sort order. The word Other displays in the search results for status=406 and status=408. | eval description=case(status = 200, "OK", status =404, "Not found", status = 500, "Internal Server Error", true, "Other") To display a default value when the status does not match one of the values specified, use the literal true. In the above example, the description column is empty for status=406 and status=408. | eval description=case(status = 200, "OK", status =404, "Not found", status = 500, "Internal Server Error") |from my_dataset where sourcetype="access_*" The following example returns descriptions for the corresponding HTTP status code. You can use this function with the eval and where commands, in the WHERE clause of the from command, and as part of evaluation expressions with other commands. The function defaults to NULL if none of the arguments are true. When the first expression is encountered that evaluates to TRUE, the corresponding argument is returned. The arguments are Boolean expressions that are evaluated from first to last. This function takes pairs of and arguments and returns the first value for which the condition evaluates to TRUE. The following list contains the functions that you can use to compare values or specify conditional statements.įor information about using string and numeric fields in functions, and nesting functions, see Overview of SPL2 evaluation functions.
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