max value per column sql code example

Example 1: sql display max value

SELECT MAX(<numeric column>) FROM <table>;
SELECT MAX(<numeric column>) FROM <table> GROUP BY <other column>;

Example 2: sql max value in column

SELECT MAX(salary) FROM employees;
SELECT id, MAX(salary) FROM employees GROUP BY id;

SELECT t1.*
FROM employees t1
INNER JOIN (
    SELECT id, max(salary) AS salary FROM employees GROUP BY id
) t2 ON t1.id = t2.id AND t1.salary = t2.salary;

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