GROUP BY

GROUP BY is a SQL clause in the SELECT Queries category. Groups rows that have the same values in specified columns, used with aggregate functions. The syntax is SELECT column, agg_func(col) FROM table GROUP BY column;. It returns grouped result set. A typical example: SELECT department, COUNT(*) FROM employees GROUP BY department; -- Count of employees per department A close relative is SELECT, which retrieves data from a table. The most fundamental SQL statement. A close relative is SELECT *, which selects all columns from a table. A close relative is SELECT DISTINCT, which returns only distinct (unique) values from the specified columns. More about this category: Core SELECT query clauses — SELECT, FROM, WHERE, GROUP BY, HAVING, ORDER BY, LIMIT. Related SELECT Queries entries: SELECT, SELECT *, SELECT DISTINCT, WHERE, AND / OR / NOT, IN, BETWEEN, LIKE.