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# MySQL | ASCII method

schedule Aug 12, 2023
Last updated
local_offer
MySQL
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MySQL's ASCII(~) method returns the ASCII numeric value of the leftmost character in the provided input string.

# Parameters

1. str | string

The string for which the leftmost character's ASCII numeric value will be returned.

# Return value

ASCII numeric value of the leftmost character in the input string.

# Examples

Consider the following table about some students:

student_id

fname

lname

day_enrolled

age

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

5

Benjamin

Town

2014-01-01

17

btown5

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

## Basic usage

To return ASCII value for the first character of student first names:

SELECT fname, ASCII(fname)
FROM students;
+----------+--------------+
| fname | ASCII(fname) |
+----------+--------------+
| Sky | 83 |
| Ben | 66 |
| Travis | 84 |
| Arthur | 65 |
| Benjamin | 66 |
+----------+--------------+

For first name 'Sky' the left most character 'S' has ASCII numeric value of 83.

## Empty string input

If the input string is empty 0 is returned:

SELECT ASCII('');
+-----------+
| ASCII('') |
+-----------+
| 0 |
+-----------+

## NULL input

If the input string is NULL, NULL is returned:

SELECT ASCII(NULL);
+-------------+
| ASCII(NULL) |
+-------------+
| NULL |
+-------------+
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