query: data.table group by with a filter condition
positive_passages.docid: 149256
positive_passages.text: Using data.table to aggregate
negative_passages.docid: 155343
negative_passages.text: Select multiple (non-aggregate function) columns with GROUP BY
negative_passages.docid: 132642
negative_passages.text: Categorize my data into 3 groups
negative_passages.docid: 48831
negative_passages.text: Sql group rows with same value, and put that value into header?
negative_passages.docid: 44237
negative_passages.text: Pivot data using LINQ
negative_passages.docid: 141208
negative_passages.text: subset a data.frame with multiple conditions
negative_passages.docid: 52697
negative_passages.text: Apply a function to a subset of data.table columns, by column-indices instead of name
negative_passages.docid: 108000
negative_passages.text: Dynamic Linq Groupby SELECT Key, List
negative_passages.docid: 100214
negative_passages.text: Group by multiple columns in dplyr, using string vector input
negative_passages.docid: 140337
negative_passages.text: Using an aggregate function in where
negative_passages.docid: 21426
negative_passages.text: How to use GROUP BY to concatenate strings in SQL Server?
negative_passages.docid: 83293
negative_passages.text: show a zero if group by returns no value
negative_passages.docid: 98720
negative_passages.text: SQL - using alias in Group By
negative_passages.docid: 99888
negative_passages.text: Best way to simulate "group by" from bash?
negative_passages.docid: 24876
negative_passages.text: Extract elements common in all column groups
negative_passages.docid: 132538
negative_passages.text: SQL Server rownumbering and filtered results
negative_passages.docid: 96679
negative_passages.text: Group By Multiple Columns