Basic SQL Concepts

Join Full Join Inner Join Left Join Right Join Aggregation Function COUNT(). MAX(). MIN(). SUM(). AVG(). The GROUP BY statement groups rows that have the same values into summary rows, like ‘find the number of customers in each country’. The GROUP BY statement is often used with above aggregation functions to group the result-set by one or more columns.

February 14, 2013 · 1 min · 59 words · Eric