docs: correct aggregation function list in aggregate.md#6002
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`avg` is not a declared function (only `average`); `count_distinct` was missing. Match the list to the declarations in std.prql. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Problem
The note in
aggregate.mdlisted the declared aggregation functions asmin,max,count,average,stddev,avgandsum. Two inaccuracies:avgis not defined instd.prql— onlyaverageexists (the example further down the same page usesaverage salary, confirming the real name).count_distinctis defined (std.prqlline 163) but was omitted.Solution
Replace
avgwithcount_distinctso the list matches the functions actually declared instd.prql(min,max,sum,average,stddev,count,count_distinct).Testing
Documentation-only change to prose (not a runnable PRQL block), so no test is added. Verified the list against the
letdeclarations instd.prql.Found during the nightly code-quality survey.