The PostgreSQL CEIL()
function is used to return the smallest integer value that is greater than or equal to a given number. This function is essential for rounding up numerical values to the nearest integer.
CEIL(number)
The CEIL()
function has the following component:
number
: The number to be rounded up.Let's look at some examples of PostgreSQL CEIL()
function queries:
SELECT CEIL(4.3) AS rounded_value;
This query returns the smallest integer value greater than or equal to 4.3, which is 5.
SELECT value, CEIL(value) AS rounded_value
FROM numbers;
This query retrieves the value
and its rounded-up value from the numbers
table.
SELECT value, CEIL(value) AS rounded_value
FROM numbers
WHERE value < 0;
This query retrieves the value
and its rounded-up value from the numbers
table where the value
is negative.
Let's go through a complete example that includes creating a table, inserting data, and using the CEIL() function to retrieve the rounded-up values.
This step involves creating a new table named numbers
to store numerical data.
CREATE TABLE numbers (
id SERIAL PRIMARY KEY,
value NUMERIC
);
In this example, we create a table named numbers
with columns for id
and value
.
This step involves inserting some sample data into the numbers
table.
INSERT INTO numbers (value)
VALUES (4.3),
(2.7),
(-3.8),
(7.1);
Here, we insert data into the numbers
table.
This step involves using the CEIL()
function to retrieve the rounded-up values from the numbers
table.
Basic CEIL()
SELECT value, CEIL(value) AS rounded_value
FROM numbers;
This query returns the smallest integer greater than or equal to each value in the 'value' column of the 'numbers' table.
CEIL() with Negative Values
SELECT value, CEIL(value) AS rounded_value
FROM numbers
WHERE value < 0;
This query returns the smallest integer greater than or equal to each negative value in the 'value' column of the 'numbers' table.
These queries demonstrate how to use the CEIL()
function to retrieve the rounded-up values from the numbers
table, including basic usage and handling negative values.
The PostgreSQL CEIL()
function is a fundamental tool for rounding up numerical values to the nearest integer. Understanding how to use the CEIL()
function and its syntax is essential for effective data retrieval and manipulation in PostgreSQL databases.