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MySQL | UCASE method

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String
schedule Jul 1, 2022
Last updated
local_offer MySQL
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MySQL's UCASE(~) method converts the input string to uppercase and returns it.

Parameters

1. str | string

The string to convert to uppercase.

Return value

The input string in uppercase.

Examples

Consider the following table about some students:

student_id

fname

lname

day_enrolled

age

username

1

Sky

Towner

2015-12-03

17

stowner1

2

Ben

Davis

2016-04-20

19

bdavis2

3

Travis

Apple

2018-08-14

18

tapple3

4

Arthur

David

2016-04-01

16

adavid4

5

Benjamin

Town

2014-01-01

17

btown5

The above sample table can be created using the code here.

Basic usage

To return student usernames in uppercase:

SELECT UCASE(username)
FROM students;
+-----------------+
| UCASE(username) |
+-----------------+
| STOWNER1 |
| BDAVIS2 |
| TAPPLE3 |
| ADAVID4 |
| BTOWN5 |
+-----------------+

To return uppercase of 'hello':

SELECT UCASE('hello');
+----------------+
| UCASE('hello') |
+----------------+
| HELLO |
+----------------+

Binary strings

To perform uppercase conversion with binary strings, the binary strings must first be converted to non-binary strings:

SET @fav_city = BINARY 'tokyo';
SELECT UCASE(@fav_city), UCASE(CONVERT(@fav_city USING utf8mb4));
+------------------------------------+-----------------------------------------+
| UCASE(@fav_city) | UCASE(CONVERT(@fav_city USING utf8mb4)) |
+------------------------------------+-----------------------------------------+
| tokyo | TOKYO |
+------------------------------------+-----------------------------------------+

On the left we see that when UCASE(~) is used with a binary string, the input remains unchanged in the output.

When the binary string is first converted to a non-binary string on the right, the input is converted to uppercase.

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Published by Arthur Yanagisawa
Edited by 0 others
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