​
Overview

MIN() function returns the minimum value from a set of records.

The input and return types we support can be seen in the table below.

Input TypeReturn Type
INTINT
LONGLONG
FLOATFLOAT
DOUBLEDOUBLE
TEXTTEXT
DATEDATE
TIMETIME
TIMESTAMP WITHOUT TIMEZONETIMESTAMP WITHOUT TIMEZONE
TIMESTAMP WITH TIMEZONETIMESTAMP WITH TIMEZONE
The return will be the same as the data type used as the input values.

Special cases:

  • Returns NULL if there are no input rows or NULL values.
  • Returns NaN if the input contains a NaN.

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Examples

We have a movies table that stores the movie details, such as the movie’s title, category, and IMDb rating:

CREATE TABLE movies (
    movieid int,
    moviename text,
    moviecategory text,
    imdbrating real
);
INSERT INTO movies (movieid, moviename, moviecategory, imdbrating)
VALUES
(8557411, 'The Shawshank Redemption', 'Drama', 9.4),
(8557421, 'Life Is Beautiful', 'Romance', 8.4),
(8557451, 'The Godfather', 'Crime', 9.3),
(8557311, 'Prisoners', 'Thriller', 8.5),
(8557321, 'Inception', 'Science Fiction', 9),
(8557351, 'The Dark Knight', 'Action', 9.2),
(8557221, 'Coco', 'Drama', 8.2),
(8557251, 'The Sixth Sense', 'Horror', 8.1),
(8557231, 'Kill Bill: Vol. 1', 'Action', 8.1),
(8557281, 'The Notebook', 'Romance', 7.8),
(8557291, 'Forrest Gump', 'Drama', 8);

SELECT * FROM movies;

It will create a table as shown below:

+---------+--------------------------+-----------------+-------------+
| movieid | moviename                | moviecategory   | imdbrating  |
+---------+--------------------------+-----------------+-------------+
| 8557411 | The Shawshank Redemption | Drama           | 9.4         |
| 8557421 | Life Is Beautiful        | Romance         | 8.4         |
| 8557451 | The Godfather            | Crime           | 9.3         |
| 8557311 | Prisoners                | Thriller        | 8.5         |
| 8557321 | Inception                | Science Fiction | 9           |
| 8557351 | The Dark Knight          | Action          | 9.2         |
| 8557221 | Coco                     | Drama           | 8.2         |
| 8557251 | The Sixth Sense          | Horror          | 8.1         |
| 8557231 | Kill Bill: Vol. 1        | Action          | 8.1         |
| 8557281 | The Notebook             | Romance         | 7.8         |
| 8557291 | Forrest Gump             | Drama           | 8           |
+---------+--------------------------+-----------------+-------------+

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Case #1: MIN() with a single expression

For example, you might want to know what is the lowest rating of all stored movies:

SELECT MIN(imdbRating) AS "Lowest Rating"
FROM movies;

It will return the following output:

+----------------+
| Lowest Rating  |
+----------------+
| 7.8            |
+----------------+

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Case #2: MIN() with GROUP BY clause

For this example, we use a GROUP BY clause to group the movie categories, then use MIN() to get the lowest rating in each movie category.

SELECT movieCategory AS "Movie Category", MIN(imdbRating) AS "Lowest Rating"
FROM movies
GROUP BY movieCategory;

It will display the lowest rating from a group of movieCategory as shown below:

+------------------+----------------+
| Movie Category   | Lowest Rating  |
+------------------+----------------+
| Thriller         | 8.5            |
| Romance          | 7.8            |
| Crime            | 9.3            |
| Horror           | 8.1            |
| Drama            | 8              |
| Action           | 8.1            |
| Science Fiction  | 9              |
+------------------+----------------+

​
Case #3: MIN() in a subquery

In this example, we can get a movie that has the lowest rating by using a subquery:

  • First, the subquery will select the lowest rating using a MIN() function and store it as the IMDbRating.
  • Then, the outer query selects the movie with a rating equal to the lowest rating stored in the IMDbRating.
SELECT movieName, IMDbRating
FROM movies
WHERE IMDbRating = (
    SELECT MIN(IMDbRating)
    FROM movies
);

It will return the following result:

+---------------+-------------+
| moviename     | imdbrating  |
+---------------+-------------+
| The Notebook  | 7.8         |
+---------------+-------------+
MAXSUM