Why would this query fail? SELECT campaign, SUM(impressions) AS impressions FROM dsp_impressions

Here is the answer of the question: Why would this query fail? SELECT campaign, SUM(impressions) AS impressions FROM dsp_impressions

• SELECT statements can not be used to choose metrics from a table.
• There is no WHERE clause to filter the query results based on one or more conditions.
• There is no GROUP BY statement; this query cannot be run without aggregation on the campaign dimension.

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