The SUBSTR SQL Function in MySQL and MariaDB - String part |
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| | SUBSTR | Syntax: | SUBSTR(String, Position, Length)
SUBSTR(String FROM Position [FOR Length]) | | Return value: | CHAR | | Synonyms: | MID, SUBSTRING | | Function type: | String function | |
| | The SUBSTR() function returns a part of "String" starting at "Position" with "Length".
The arguments can also be specified using the FROM and FOR keywords.
If the "Length" argument is not specified, the function returns the remainder string starting at "Position".
If length is 0 or negative, the function returns an empty string.
If "Length" is not specified and "Position" is negative, SUBSTR() returns a string from the right of "String" with the number of characters from the positive value of "Position".
Numeric values of "String" are interpreted as character strings.
If either argument is NULL, the SUBSTR() function returns NULL. | SQL Examples for the SUBSTR function |
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| select substr('Test', 2, 2);
select substr('Test', 2);
select substr(123456, 2, 2);
select substr('Test' from 2 for 2);
select substr('Test' from 2);
select substr('Test', -1);
select substr('Test', -2);
select substr('Test', 2, 0);
select substr('Test', 2, -1);
select substr(null, 2, 2);
select substr('Test', null, 2);
select substr('Test', 2, null);
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| substr('Test', 2, 2) |
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| varchar(2) BINARY |
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| es |
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| substr('Test', 2) |
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| varchar(3) BINARY |
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| est |
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| substr(123456, 2, 2) |
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| varchar(2) BINARY |
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| 23 |
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| substr('Test' from 2 for 2) |
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| varchar(2) BINARY |
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| es |
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| substr('Test' from 2) |
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| varchar(3) BINARY |
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| est |
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| substr('Test', -1) |
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| varchar(1) BINARY |
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| t |
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| substr('Test', -2) |
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| varchar(2) BINARY |
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| st |
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| substr('Test', 2, 0) |
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| varchar(0) BINARY |
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| substr('Test', 2, -1) |
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| varchar(0) BINARY |
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| substr(null, 2, 2) |
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| varchar(0) BINARY |
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| NULL |
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| substr('Test', null, 2) |
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| varchar(0) BINARY |
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| NULL |
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| substr('Test', 2, null) |
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| varchar(0) BINARY |
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| NULL |
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| | The examples were created with the MyWAY SQL manager: | How to use the SUBSTR() function in MySQL and MariaDB databases | | In MySQL and MariaDB, the SUBSTR() function can be used to extract a substring from a character string, the start position and optionally the length of the substring to be extracted can be specified. SUBSTR() is useful when a portion of a string needs to be extracted based on a specific position and length, for example for data manipulation or to generate custom output based on string values. | | Further MySQL und MariaDB SQL String functions | | CHAR | CHAR(Character code, [, Charset]) | | More about CHAR Function |
| | CHR | CHR(Character code) | | More about CHR Function |
| | CONCAT | CONCAT(Strings ('str1','str2', ...)) | | More about CONCAT Function |
| | CONCAT_WS | CONCAT_WS(Separator, Strings ('str1','str2', ...)) | | More about CONCAT_WS Function |
| | ELT | ELT(Index, Strings ('str1','str2', ...)) | | More about ELT Function |
| | EXPORT_SET | EXPORT_SET(Bits, On, Off [, Separator] [, Number of bits]) | | More about EXPORT_SET Function |
| | EXTRACTVALUE | EXTRACTVALUE(XML, XPath) |
| | FIELD | FIELD(Search string, Strings ('str1','str2', ...)) | | More about FIELD Function |
| | FORMAT | FORMAT(Number, Decimals [, Region]) | | More about FORMAT Function |
| | INSERT | INSERT(String, Position, Length, String to insert) | | More about INSERT Function |
| | LCASE | LCASE(String) | | More about LCASE Function |
| | LEFT | LEFT(String, Length) | | More about LEFT Function |
| | LOAD_FILE | LOAD_FILE(File name) |
| | LOWER | LOWER(String) | | More about LOWER Function |
| | LPAD | LPAD(String, Length, String to append) | | More about LPAD Function |
| | LPAD_ORACLE | LPAD_ORACLE(String, Length, String to append) | | More about LPAD_ORACLE Function |
| | LTRIM | LTRIM(String) | | More about LTRIM Function |
| | MAKE_SET | MAKE_SET(Bits, Strings ('str1','str2', ...)) | | More about MAKE_SET Function |
| | MID | MID(String, Position [, Length]) | | More about MID Function |
| | QUOTE | QUOTE(String) | | More about QUOTE Function |
| | REPEAT | REPEAT(String, Number) | | More about REPEAT Function |
| | REPLACE | REPLACE(String, Search, Replace) | | More about REPLACE Function |
| | REVERSE | REVERSE(String) | | More about REVERSE Function |
| | RIGHT | RIGHT(String, Length) | | More about RIGHT Function |
| | RPAD | RPAD(String, Length, String to append) | | More about RPAD Function |
| | RPAD_ORACLE | RPAD_ORACLE(String, Length, String to append) | | More about RPAD_ORACLE Function |
| | RTRIM | RTRIM(String) | | More about RTRIM Function |
| | SOUNDEX | SOUNDEX(String) | | More about SOUNDEX Function |
| | SPACE | SPACE(Number) | | More about SPACE Function |
| | SUBSTRING | SUBSTRING(String, Position, Length) | | More about SUBSTRING Function |
| | SUBSTRING_INDEX | SUBSTRING_INDEX(String, Delimiter, Number) | | More about SUBSTRING_INDEX Function |
| | TRIM | TRIM([Type] [, Delete character], , String) | | More about TRIM Function |
| | TRIM_ORACLE | TRIM_ORACLE([Type] [, Delete character], , String) | | More about TRIM_ORACLE Function |
| | UCASE | UCASE(String) | | More about UCASE Function |
| | UPPER | UPPER(String) | | More about UPPER Function |
| | WEIGHT_STRING | WEIGHT_STRING(String [AS Format] [LEVEL Level] [Sorting]) | | More about WEIGHT_STRING Function |
| | ASCII | ASCII(String) | | More about ASCII Function |
| | BIT_LENGTH | BIT_LENGTH(String) | | More about BIT_LENGTH Function |
| | CHAR_LENGTH | CHAR_LENGTH(String) | | More about CHAR_LENGTH Function |
| | CHARACTER_LENGTH | CHARACTER_LENGTH(String) | | More about CHARACTER_LENGTH Function |
| | FIND_IN_SET | FIND_IN_SET(Search string, Set of values) | | More about FIND_IN_SET Function |
| | INSTR | INSTR(String, Search string) | | More about INSTR Function |
| | LENGTH | LENGTH(String) | | More about LENGTH Function |
| | LENGTHB | LENGTHB(String) | | More about LENGTHB Function |
| | LOCATE | LOCATE(Search string, String [, Position]) | | More about LOCATE Function |
| | OCTET_LENGTH | OCTET_LENGTH(String) | | More about OCTET_LENGTH Function |
| | ORD | ORD(String) | | More about ORD Function |
| | POSITION | POSITION(Search string IN String) | | More about POSITION Function |
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| | | More information about the SUBSTR SQL function: and and |
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