Sum MySQL

MySQL is a popular relational database management system that offers a wide range of functionalities, including the ability to use the SUM function to compute the sum of values in a column. In this article, we will explore the SUM function in MySQL and how it can be used to perform various calculations.

Syntax

The SUM function in MySQL has the following syntax:

SUM(column_name)

Here, column_name is the name of the column whose values we want to sum.

Example

Consider the following table sample_data with two columns id and value:

| id | value | | -- | ----- | | 1 | 10 | | 2 | 20 | | 3 | 30 | | 4 | 40 | | 5 | 50 |

To compute the sum of values in the value column, we can use the following SQL query:

SELECT SUM(value) FROM sample_data;

This will return the sum of values in the value column:

| SUM(value) | | ---------- | | 150 |

Group By

We can also use the SUM function in combination with the GROUP BY clause to compute the sum of values for each group in the table. Consider the following table sales_data with three columns product, month, and sales:

| product | month | sales | | ------- | ----- | ----- | | A | Jan | 100 | | B | Jan | 200 | | A | Feb | 150 | | B | Feb | 250 |

To compute the sum of sales for each product, we can use the following SQL query:

SELECT product, SUM(sales) FROM sales_data GROUP BY product;

This will return the sum of sales for each product:

| product | SUM(sales) | | ------- | ---------- | | A | 250 | | B | 450 |

Conclusion

In conclusion, the SUM function in MySQL is a powerful tool that enables us to perform various calculations on a table's column. With its simple syntax and versatility, we can use it to compute sums, averages, and other types of calculations easily.