max sql code example

Example 1: DISTINCT SQL

SELECT DISTINCT column1, column1, ..... FROM TABLE
/*DISTINCT WILL NOT SELECT THE SAME VALUES IN SAME COLUMN*/

Example 2: sql display max value

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

Example 3: distinct sql

Distinct: helps to displays the non duplicate
records when retrieving the records from a table.

SELECT DISTINCT FIRST_NAME FROM VISITORS;

Example 4: 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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