Answers for "sql group by where"

SQL group by having clause

SELECT
    customer_id,
    YEAR (order_date),
    COUNT (order_id) order_count
FROM
    sales.orders
GROUP BY
    customer_id,
    YEAR (order_date)
HAVING
    COUNT (order_id) >= 2
ORDER BY
    customer_id;
Code language: SQL (Structured Query Language) (sql)

group by clause in ms sql

/*Group by clause is used to group a selected  set of rows into a set of summary 
rows by the values of one or more column or expression. It is always used in
Conjunction with one or more aggregate function.*/
SELECT AGGREGATE_FUNCTION(Column_Name) FROM Table_Name
/*Group by exmaple*/
SELECT city, sum(Salary) as TotalSalary FROM tblEmployee GROUP BY City

GROUP BY

SELECT <field1, field2, field3…>
FROM <table1_name>
WHERE <condition/expression>
GROUP BY <field1, field2, field3…>