There is no separate table for that. All logs are in the main table mdl_logstore_standard_log which has a column for course called courseid. All you need to do is filter on that column to limit it to specific courses. You will find several examples of how to use this in the Ad-hoc contributed reports page, eg https://docs.moodle.org/311/en/ad-hoc_contributed_reports#Total_activity_per_course.2C_per_unique_user_on_the_last_24h.
Analytics and reporting
Total Course Logs
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