How to: Traces query example for system.opentelemetry_span_log
```sql
SELECT
  trace_id AS traceID,
  span_id AS spanID,
  operation_name AS operationName,
  parent_span_id AS parentSpanID,
  'clickhouse' AS serviceName,
  intDiv(finish_time_us - start_time_us, 1000) AS duration,
  intDiv(start_time_us,1000) AS startTime,
  attribute AS tags,
  map('hostName',hostname) AS serviceTags
FROM
  system.opentelemetry_span_log
WHERE $timeFilter
ORDER BY traceID, startTime
```