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.
I'm working on creating a SQL query that will pull records from a table based on the value of two …
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sql database postgresql aggregate-functions crosstabI am new to Oracle and the SQL world. I have a slight issue with a query that I cannot …
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mysql sql group-by max aggregate-functionsI'm using the northwind database to refresh my SQL skills by creating some more or less complex queries. Unfortunately I …
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sql mysql aggregate-functionsI am trying to fetch the first and the last record of a 'grouped' record. More precisely, I am doing …
mysql aggregate-functionsI'd like to perform division in a SELECT clause. When I join some tables and use aggregate function I often …
sql postgresql null aggregate-functions divide-by-zeroGiven this data set: ID Name City Birthyear 1 Egon Spengler New York 1957 2 Mac Taylor New York 1955 3 Sarah Connor Los Angeles 1959 4 …
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