Copilot: The time_bucket function is a part of TimescaleDB, an open-source database designed to make SQL scalable for time-series data. It's not a standard SQL function, but specific to TimescaleDB. time_bucket('$__interval', timestamp) is used to create a "bucket" of time, which is a specific interval of time. The function takes two arguments: The interval of time for each bucket. In this case, it's represented by the variable $__interval. This could be any interval like '5 minutes', '1 hour', '1 day', etc. The actual value is usually determined at runtime. The timestamp column on which to apply the bucketing. In this case, it's the timestamp column from your table. The function groups the timestamp values into intervals of $__interval length. For example, if $__interval is '5 minutes', then all the timestamps that fall within a specific 5-minute interval will be placed into the same bucket. The function returns the start time for each of these intervals. This is often used in time-series data analysis, where you want to aggregate data over regular time intervals.