How to perform division operation in mysql

MySQL is one of the most popular database management systems in the world and is widely used in major enterprises and websites. The operation operation involved is one of the database operations, and the division operation in the database is also a very important part. This article will introduce MySQL division, including basic concepts and operation methods.

1. Basic concepts

Division is a basic operation in mathematics, used to calculate the quotient of two numbers. In MySQL, division operation is also an operation of calculating the quotient of two numbers. In mathematics, the quotient of two numbers may be a decimal, and in most cases it is an infinitely repeating decimal. In MySQL, the calculated quotient can be in the form of integer, decimal or scientific notation, so you need to pay attention to this when performing division operations in MYSQL.

2. Operation method

The operator for division in MySQL is "/", and its syntax is as follows:

expr1 / expr2

Among them, expr1 and expr2 are two numeric expressions used for division operations.

The division operator is used in the same way as other numerical operators and can be used with SELECT, WHERE, and GROUP BY statements. Here are a few examples to demonstrate.

Example 1:

SELECT 10/3;

The result obtained is 3.

Among them, 10 and 3 both represent numerical values. By dividing these two numbers, the quotient is 3.

Example 2:

SELECT 10/3.0;

The result obtained is 3.333333.

Since the divisor becomes a floating point number when added to the decimal point, the result is a floating point number.

Example 3:

SELECT 10/0;

The result obtained is an error message: "#DIV/0!"

When using division operation When , the divisor cannot be 0, otherwise an error message will be generated.

Example 4:

SELECT 3.3e-1/1.1e-1;

The result is 3.000000.

This result represents the result of scientific notation and can be converted to decimal, so the query result is 3.000000.

3. Summary

MySQL’s division operator “/” is used to calculate the quotient between two numerical expressions and supports multiple forms of results (including integers, decimals, and scientific notation). When using division, you need to pay attention to the fact that the divisor is not 0, otherwise an error will be reported. At the same time, you also need to make choices and conversions according to actual needs. Database division is also a very important operation that we often use in daily life. I hope that the introduction in this article can give everyone a deeper understanding of MySQL's division operation.

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