What are some alternative methods to using MAX(datum) and GROUP BY in SQL queries to achieve the desired result of grouping data by the latest date?

When grouping data by the latest date in SQL queries, using MAX(datum) and GROUP BY can be resource-intensive and may not always produce the desired result. An alternative method is to use a subquery to select the maximum date for each group and then join this subquery back to the original table to filter the data accordingly. This approach can help optimize the query and ensure accurate results. 

SELECT t1.*
FROM your_table t1
JOIN (
    SELECT id, MAX(datum) AS max_date
    FROM your_table
    GROUP BY id
) t2 ON t1.id = t2.id AND t1.datum = t2.max_date;

Keywords

SQL alternative methods MAX function GROUP BY latest date

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