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SQL functionMySQLMariaDB

The ASCII SQL Function in MySQL and MariaDB - Value of first byte of string

ASCIISyntax:ASCII(String)
Return value:INTEGER
Function type:String function
Function Description

The ASCII() function returns the numeric value of the first byte of "String".

In the case of characters consisting of several bytes, only the value of the first byte is returned.

If the value of the entire character is to be returned for multibyte characters, the ORD() function can be used.

Numeric arguments are converted to strings.

If the value of the argument is NULL, ASCII() returns NULL.

SQL Examples for the ASCII function

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select charset('äöü');
select ascii('test');
select ascii('äöü');
select ascii(convert('äöü' using utf8));
select ascii(convert('äöü' using utf32));

select hex(ascii('test'));
select hex(ascii(convert('ä' using utf32)));
select hex('ä');
select hex(convert('ä' using utf32));

select ascii('12');
select ascii(12);

select ascii(null);

charset('äöü')
varchar(64) BINARY
binary
ascii('test')
int(3)
116
ascii('äöü')
int(3)
195
ascii(convert('äöü' using utf8))
int(3)
195
ascii(convert('äöü' using utf32))
int(3)
0
hex(ascii('test'))
varchar(6) BINARY
74
hex(ascii(convert('ä' using utf32)))
varchar(6) BINARY
0
hex('ä')
varchar(4) BINARY
C3A4
hex(convert('ä' using utf32))
varchar(16) BINARY
0000C3A4
ascii('12')
int(3)
49
ascii(12)
int(3)
49
ascii(null)
int(3)
NULL
The examples were created with the MyWAY SQL manager: Download

How to use the ASCII() function in MySQL and MariaDB databases

In MySQL and MariaDB the ASCII() function is used to get the ASCII value of a specific character. ASCII() takes a single character as an argument and returns an integer representing its ASCII value. The function is useful when the ASCII value of a specific character needs to be determined in various applications, such as character analysis, character manipulation, or sorting based on ASCII values.

Further MySQL und MariaDB SQL String functions

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ELTELT(Index, Strings ('str1','str2', ...))
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FORMATFORMAT(Number, Decimals [, Region])
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INSERTINSERT(String, Position, Length, String to insert)
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LCASELCASE(String)
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LEFTLEFT(String, Length)
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LOAD_FILELOAD_FILE(File name)

LOWERLOWER(String)
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LPADLPAD(String, Length, String to append)
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LPAD_ORACLELPAD_ORACLE(String, Length, String to append)
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LTRIMLTRIM(String)
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MAKE_SETMAKE_SET(Bits, Strings ('str1','str2', ...))
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REPEATREPEAT(String, Number)
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REPLACEREPLACE(String, Search, Replace)
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REVERSEREVERSE(String)
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RIGHTRIGHT(String, Length)
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RPADRPAD(String, Length, String to append)
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RPAD_ORACLERPAD_ORACLE(String, Length, String to append)
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RTRIMRTRIM(String)
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SOUNDEXSOUNDEX(String)
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SPACESPACE(Number)
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SUBSTRSUBSTR(String, Position, Length)
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SUBSTRINGSUBSTRING(String, Position, Length)
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SUBSTRING_INDEXSUBSTRING_INDEX(String, Delimiter, Number)
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TRIMTRIM([Type] [, Delete character], , String)
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TRIM_ORACLETRIM_ORACLE([Type] [, Delete character], , String)
More about TRIM_ORACLE Function

UCASEUCASE(String)
More about UCASE Function

UPPERUPPER(String)
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WEIGHT_STRINGWEIGHT_STRING(String [AS Format] [LEVEL Level] [Sorting])
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BIT_LENGTHBIT_LENGTH(String)
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CHAR_LENGTHCHAR_LENGTH(String)
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CHARACTER_LENGTHCHARACTER_LENGTH(String)
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INSTRINSTR(String, Search string)
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LENGTHLENGTH(String)
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LENGTHBLENGTHB(String)
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LOCATELOCATE(Search string, String [, Position])
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OCTET_LENGTHOCTET_LENGTH(String)
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ORDORD(String)
More about ORD Function

POSITIONPOSITION(Search string IN String)
More about POSITION Function

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More information about the ASCII SQL function: mysql.com and mariadb.com and w3schools.com
Updated: 2023-09-24ImprintContactTerms & conditionsPrivacy & CookiesUpdatesSitemapFacebookLinkedinTwitterStatistics©2020-2023 Heino Cunze-Fischer