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startswith_cs operator

  • Article

Filters a record set for data with a case-sensitive string starting sequence.

The following table compares the startswith operators using the abbreviations provided:

  • RHS = right-hand side of the expression
  • LHS = left-hand side of the expression
Operator Description Case-Sensitive Example (yields true)
startswith RHS is an initial subsequence of LHS No "Fabrikam" startswith "fab"
!startswith RHS isn't an initial subsequence of LHS No "Fabrikam" !startswith "kam"
startswith_cs RHS is an initial subsequence of LHS Yes "Fabrikam" startswith_cs "Fab"
!startswith_cs RHS isn't an initial subsequence of LHS Yes "Fabrikam" !startswith_cs "fab"

For more information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.

Performance tips

Note

Performance depends on the type of search and the structure of the data. For best practices, see Query best practices.

Syntax

T | where col startswith_cs (expression)

Learn more about syntax conventions.

Parameters

Name Type Required Description
T string ✔️ The tabular input to filter.
col string ✔️ The column used to filter.
expression string ✔️ The expression by which to filter.

Returns

Rows in T for which the predicate is true.

Example

Run the query

StormEvents
| summarize event_count=count() by State
| where State startswith_cs "I"
| where event_count > 2000
| project State, event_count

Output

State event_count
IOWA 2337
ILLINOIS 2022