MySQL Standard Deviation: Examples

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SELECT STD(orderCount)
FROM (SELECT customerNumber, count(*) orderCount
FROM orders
GROUP BY customerNumber) t;

SELECT STDDEV_SAMP(orderCount)
FROM (SELECT customerNumber, count(*) orderCount
FROM orders
WHERE status = 'Shipped'
GROUP BY customerNumber) t;

SELECT * FROM customers;

SELECT * FROM employees;

SELECT * FROM offices;

SELECT * FROM orderdetails;

SELECT * FROM orders;

SELECT * FROM payments;

SELECT * FROM productlines;

SELECT * FROM products;

Execute

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