Aggregate functions are a subset of SQL functions that compute a single value from multiple input rows, mostly used in `SELECT` queries with a `GROUP BY` clause.
For my problem, we have a schema whereby one photo has many tags and also many comments. So if I …
sql json postgresql distinct aggregate-functionsI have 3 tables: users(id, account_balance) grocery(user_id, date, amount_paid) fishmarket(user_id, date, amount_paid) Both …
sql postgresql left-join aggregate-functionsOn Hive, I believe count(distinct) will be more likely than group-by to result in an unbalanced workload to reducers …
performance hive aggregate-functionsWhen using the SQL MIN() function, along with GROUP BY, will any additional columns (not the MIN column, or one …
sql mysql aggregate-functionsI have been trying to generate a series of dates (YYYY-MM-DD HH) from the first until the last date in …
sql postgresql aggregate-functions generate-seriesI am currently working on a homework assignment that requires a selection to occur that pulls out an element containing …
sql aggregate aggregate-functions max relational-algebraI'm trying to put together a query that will retrieve the statistics of a user (profit/loss) as a cumulative …
sql postgresql aggregate-functions window-functionsI was trying to return an average and count of a set of ratings in one query. I managed it …
java spring jpa spring-data aggregate-functionsIs it possible to concatenate strings with one or more of other group by function like sum, avg, count etc . …
sql sql-server tsql aggregate-functions sql-server-group-concatIn my current application, I need to be able to do this type of query: SELECT MIN((colA, colB, colC)) …
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