How to use the CEILING function in MySQL to round up a value

How to use the CEILING function in MySQL to round up a value

The CEILING function is a mathematical function provided by MySQL and is used to round up a value. In some cases, we may need to round up the values, such as calculating the sales quantity of goods, counting student scores, etc. This article will introduce in detail how to use the CEILING function in MySQL and provide corresponding code examples.

First, let us quickly understand the basic usage of the CEILING function. The syntax for using the CEILING function is as follows:

CEILING(number)

Among them, "number" represents the value that needs to be rounded up. This function returns the smallest integer greater than or equal to "number".

Now, let’s look at a specific code example. Suppose we have a product table with a field that records the sales quantity of each product. We want to obtain the rounded-up result of the sales quantity of each product through query.

First, create a table named "products" and insert some sample data:

CREATE TABLE products (
  id INT NOT NULL AUTO_INCREMENT,
  name VARCHAR(50) NOT NULL,
  sales_quantity DECIMAL(10, 2) NOT NULL,
  PRIMARY KEY (id)
);

INSERT INTO products (name, sales_quantity) VALUES
  ('商品A', 10.5),
  ('商品B', 8.2),
  ('商品C', 15.9);

Next, use the CEILING function to query and obtain the sales quantity after rounding up:

SELECT name, CEILING(sales_quantity) AS sales_quantity_ceil
FROM products;

Run the above query statement, we will get the following results:

name    | sales_quantity_ceil
---------------------------
商品A   | 11
商品B   | 9
商品C   | 16

Through the above example, we can see that the CEILING function successfully rounds the value up and returns the corresponding result. In this way, we can easily round up the numerical value in MySQL.

In addition to rounding up the DECIMAL type value in the above example, the CEILING function can also be applied to other common data types, such as integers (INT), floating point numbers (FLOAT), etc.

To sum up, the CEILING function is a very practical mathematical function in MySQL, which can help us easily round up the value. By using the CEILING function, we can easily complete some numerical calculation tasks that require rounding up. I hope this article will help you understand and master the use of CEILING function.

Keywords: MySQL, CEILING function, rounding up, numerical calculation, code example

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