query: Add a new column of the sum by group
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negative_passages.text: Adding an identity to an existing column
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negative_passages.text: Writing python script to group and sum records from each group?
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negative_passages.text: How can I perform this aggregate?
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negative_passages.text: How to sum each column and print column name and column sum using awk?
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negative_passages.text: Conditional summing (R)
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negative_passages.text: Summing data from column in the Attribute table
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negative_passages.text: Excel, want to read a column and sum up the values that match in another column
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negative_passages.text: How to compute the sum of a series
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negative_passages.text: Dynamic pivot: sum of sales per month
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negative_passages.text: How to turn this into an equation and then sum the series?
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negative_passages.text: Grouping functions (tapply, by, aggregate) and the *apply family
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negative_passages.text: How get the sum for every distinct value in another column?
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negative_passages.text: Sum the values in a column except the header
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negative_passages.text: Solve sum with indices
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negative_passages.text: Sum up rows from different data files