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Microsoft Sentinel in Action - Second Edition
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String and numeric operators are used in the comparisons of a where clause. We have already seen ==, which is a string equals operator. As we stated earlier, this is a case-sensitive operator, meaning that ABC == ABC is true but ABC == abc is false.
Note
You may need to carry out a case-insensitive comparison using =~. In this case, ABC =~ abc returns true. While there are commands to change text to uppercase or lowercase, it is good practice to not do that just for a comparison but rather do a case-insensitive comparison.
Some other string operators that can be used are as follows:
Table 5.2
In addition, by placing ! in front of any command, that command is negated. For example, !contains means does not contain and !in means not in.
For a complete list of operators, go to https://docs.microsoft.com/en-us/azure/data-explorer/kusto/query/datatypes-string-operators.
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