sql max 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;

Example 3: sql set max value in column

ALTER TABLE dbo.mytable ADD CONSTRAINT CK_HAPPINESS_MAX CHECK (PokemonHappiness <= 10000)

Example 4: how to get max from each department in sql

SELECT firstname, MAX(salary)
FROM department d LEFT OUTER JOIN employee e
ON (d.department_id = e.department_id)
GROUP BY department_id;

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Misc Example

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