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help on a complex lookup data matching in order to calculate a new field

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Hi I use the search below in order to catch a field called "flag_patch_version" from a csv file called "patchlevel.csv" | inputlookup host.csv | lookup patchlevel.csv "Computer" as host | stats count by host flag_patch_version | where isnotnull(flag_patch_version) | rename host as Hostname, flag_patch_version as "Current Patch level" | fields - count | table Hostname "Current Patch level" | sort +"Current Patch level" limit=10 I have a second csv file called "patch_in_late.csv" you can see in https://www.cjoint.com/c/IGxhVGCNdNb What I need is to add a column called "patch_in_late_count" in my main search which compare the current patch level of a specific hostname to the current patch level in "patch_in_late.csv" The syntax of the patch level is W10P**041**.$w$ The number in bold is incremented every month with + 1 If for July, the patch level is W10P**041**.$w$, it will be W10P**042**.$w$ for august By comparison, I mean that I need to count the number of patch in late between the 2 data sources for the current month Example: Imagine that the current patch level for a specific machine is W10P041.$w$ and the patch level for the current month is W10P045.$w$ in "patch_in_late.csv", then I need to display in "patch_in_late_count" colum the difference between the two patches, that is to say 4 (45 - 41) Is anybody can help me on this complex development please??

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