How to Change "is billable" value

How to Change "is billable" value

Hi,

till now, our Worklogs have been submitted with "Yes" Value for "Is Billable" field. how can I change this value to "No" for All Worklogs in the database????
Can you provide the a query for this???

My SDP MSP version: 10510
My Database : MSSQL Server

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