What is the method of converting MySQL strings to numbers

This article mainly explains "what is the method of converting MySQL strings into numbers". The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the method of converting MySQL strings into numbers".

Method 1: add 0 directly

Select '123' + 0

Method 2: function convert

Syntax: convert (value, type)

Type can be:

Decimal floating point signed integers unsigned unsigned integers

Select convert ('123 signed)

Method 3: function cast

Syntax: cast (value as type)

Type can be:

Decimal floating point signed integers unsigned unsigned integers

Select cast ('123' as signed)

Add: let's take a look at the three ways of converting mysql strings to numbers.

Method 1: + 0

Method 2: cast ('string' as numeric type)

Numeric types can be divided into three types:

Integer: SIGNED

Unsigned integers: UNSIGNED

Floating point numbers: DECIMAL

Method 3: convert ('string', numeric type)

Numeric types can also be divided into three types:

Integer: SIGNED

Unsigned integers: UNSIGNED

Floating point numbers: DECIMAL

Thank you for reading, the above is the content of "what is the method of converting MySQL strings into numbers". After the study of this article, I believe you have a deeper understanding of what the method of converting MySQL strings into numbers is, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!