MySQL CEIL And CELING Functions: Round Up

In this tutorial, you will learn about the MySQL CEIL and CEILING functions, which are equivalent and can be used interchangeably. These functions return the smallest integer value that is greater than or equal to a specified number.

Prerequisites:

A MySQL server up and running
Access to a MySQL user account with privileges to query tables

Tutorial:

Connect to the MySQL server:

To start the mysql command-line client, open a terminal or command prompt, and enter:

mysql -u [username] -p

Replace [username] with your MySQL username and enter your password when prompted.

Select a database:

Select the database containing the table you want to query:

USE [database_name];

Replace [database_name] with the name of your database.

Using CEIL/CEILING functions with a constant:

You can use the CEIL or CEILING function with a constant value. For example:

SELECT CEIL(3.5); -- Returns 4
SELECT CEILING(3.5); -- Returns 4

Using CEIL/CEILING functions with a column:

Suppose you have a products table with the following columns: id, name, price, and quantity. You can use the CEIL or CEILING function to calculate the total number of boxes required to pack the products, assuming each box can hold up to 10 items.

SELECT id, name, price, quantity,
    CEIL(quantity / 10) AS total_boxes
FROM products;

Using CEIL/CEILING functions with an expression:

You can also use the CEIL or CEILING function with expressions. For example, let's say you want to calculate the discount price after applying a 25% discount to each product's price:

SELECT id, name, price,
    CEIL(price * 0.75) AS discount_price
FROM products;

Exit the MySQL command-line client:

EXIT;

Now you have learned how to use the MySQL CEIL and CEILING functions. These functions are useful when you need to round up a number to the nearest integer, such as in calculating the total number of boxes required to pack items or rounding up discount prices.

How to use CEIL function in MySQL:
- Employ the CEIL function to round up numbers to the nearest integer.
```
SELECT CEIL(number) AS rounded_up_value;
```
Rounding up numbers in MySQL with CEIL:
- Use CEIL to round up decimal or floating-point numbers.
```
SELECT CEIL(5.75) AS rounded_up_value; -- Result: 6
```

MySQL CEILING function examples:

Example:

SELECT CEIL(8.3) AS rounded_up_value; -- Result: 9

Using CEIL for integer rounding in MySQL:
- CEIL rounds positive decimal numbers up to the next integer.
```
SELECT CEIL(3.2) AS rounded_up_value; -- Result: 4
```
Rounding decimals up with CEIL in MySQL:
- Rounding up decimals using CEIL.
```
SELECT CEIL(2.45) AS rounded_up_value; -- Result: 3
```
CEIL vs ROUND function in MySQL:
- Compare CEIL with ROUND for different rounding behaviors.
```
SELECT CEIL(4.3) AS ceil_result, ROUND(4.3) AS round_result; -- Result: 5, 4
```
MySQL CEIL for rounding positive numbers:
- Apply CEIL to round positive numbers up.
```
SELECT CEIL(7.8) AS rounded_up_value; -- Result: 8
```
Negative numbers and CEIL in MySQL:
- Rounding negative numbers up using CEIL.
```
SELECT CEIL(-3.6) AS rounded_up_value; -- Result: -3
```
CEIL function in MySQL for floating-point values:
- Use CEIL for rounding floating-point values.
```
SELECT CEIL(9.99) AS rounded_up_value; -- Result: 10
```
MySQL CEIL function in mathematical expressions:
- Incorporate CEIL in mathematical expressions.
```
SELECT CEIL(column1 * 1.5) AS rounded_result FROM table_name;
```
Applying CEIL in WHERE clause in MySQL:
- Apply CEIL in the WHERE clause for conditional filtering.
```
SELECT column1 FROM table_name WHERE CEIL(column2) > 5;
```
Using CEIL with aggregate functions in MySQL:
- Combine CEIL with aggregate functions for rounded results.
```
SELECT AVG(CEIL(column1)) AS average_rounded_value FROM table_name;
```
MySQL CEIL for rounding in SELECT queries:
- Use CEIL within SELECT queries for rounded results.
```
SELECT column1, CEIL(column2) AS rounded_value FROM table_name;
```