aggregate-functions

问题 I have the following table data: value 1 5 10.5 12 36 I want to map these values into: range avg 0-21 (1 + 5 + 10.5 + 12) / 4 21.001-34 0 34.001-64 36 64 + 0 Basically map each value to ranges and calculate the avg of all values in each range. I tried to do: select case when avggeneral between 0 and 21 then ' 0-21' when avggeneral between 21.00001 and 34 then ' 21-34' when avggeneral between 34.00001 and 64 then ' 34-64' else '64+' end as 'range', AVG(*) as 'avg' from table but this doesn't

问题 It's Friday afternoon * and my brain has stopped working. Normally it is me who's answering dumb SQL questions like this, sorry! I am trying to get one table, along with the highest value of a column of another table by LEFT JOINing the latter to the former. SELECT jobs.*, MAX(notes.`timestamp`) AS complete_date FROM jobs LEFT JOIN notes ON (jobs.id=notes.job_id) WHERE (jobs.status="complete" OR jobs.status="closed") AND (notes.type="complete" OR notes.type IS NULL) GROUP BY jobs.id ORDER BY

来源： https://stackoverflow.com/questions/64794361/creating-rolling-periods

来源： https://stackoverflow.com/questions/56059630/is-there-a-way-of-aggregating-rows-without-summing-up-their-results

来源： https://stackoverflow.com/questions/64411766/using-two-aggregate-values-from-a-select-subquery-in-a-single-outer-select-query

来源： https://stackoverflow.com/questions/64411766/using-two-aggregate-values-from-a-select-subquery-in-a-single-outer-select-query

来源： https://stackoverflow.com/questions/800347/sql-avgcount

来源： https://stackoverflow.com/questions/800347/sql-avgcount

来源： https://stackoverflow.com/questions/7054159/how-can-i-compare-two-fields-of-a-model-in-a-query

来源： https://stackoverflow.com/questions/7054159/how-can-i-compare-two-fields-of-a-model-in-a-query