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1. CHAR Function​

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char

1. CHAR Function​

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The CHAR function in H2 database is used to convert an ASCII code or Unicode code point to its corresponding character.

2. Syntax​

The syntax for the CHAR function in H2 database is as follows:

CHAR(code)

Arguments​

  • code: The ASCII code or Unicode code point for which the character needs to be retrieved. It should be a numeric value.

Return​

  • The CHAR function returns the character corresponding to the given code.

3. Notes​

  • The CHAR function in H2 database supports both ASCII codes and Unicode code points. However, it is recommended to use Unicode code points for better compatibility and support for a wider range of characters.
  • If the input code is not a number or exceeds the valid code range, the CHAR function will return NULL.
  • Make sure to provide the correct code to retrieve the desired character.

4. Examples​

Here are a few examples demonstrating the usage of the CHAR function in H2 database:

Example 1 - Retrieving character for ASCII code:​

SELECT CHAR(65) AS character;

Output:

character
---------
A

Example 2 - Retrieving character for Unicode code point:​

SELECT CHAR(9731) AS character;

Output:

character
---------
☃

Example 3 - Retrieving characters for a range of code points:​

SELECT CHAR(9786) AS smiley, CHAR(9829) AS heart, CHAR(128516) AS emoji;

Output:

smiley | heart | emoji
-------+-------+------
☺      | ♥     | 😄
  • ascii - Convert character to ASCII code
  • UNICODE - Convert character to Unicode code point