The INSTR SQL Function in MySQL and MariaDB - Search in string |
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| | INSTR | Syntax: | INSTR(String, Search string) | | Return value: | INTEGER | | Function type: | String function | |
| | The INSTR() function returns the position of the first occurrence of "Search string" in "String".
If "Search string" is not found, the function returns 0.
If "Search string" is empty, the result is 1.
If "String" or "Search string" contain numeric values, these are interpreted as character strings.
The INSTR() function performs a case-sensitive search.
If either argument is NULL, the INSTR() function returns NULL. | SQL Examples for the INSTR function |
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| select instr('Test', 'e');
select instr('Test', 'st');
select instr('Test', 'T');
select instr('Test', 't');
select instr(123456, 4);
select instr('Test', '');
select instr('Test', 'x');
select instr('', '');
select instr(null, 'e');
select instr('Test', null);
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| instr('Test', 'e') |
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| int(11) |
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| 2 |
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| instr('Test', 'st') |
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| int(11) |
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| 3 |
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| instr('Test', 'T') |
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| int(11) |
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| 1 |
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| instr('Test', 't') |
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| int(11) |
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| 4 |
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| instr(123456, 4) |
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| int(11) |
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| 4 |
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| instr('Test', '') |
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| int(11) |
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| 1 |
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| instr('Test', 'x') |
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| int(11) |
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| 0 |
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| instr(null, 'e') |
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| int(11) |
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| NULL |
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| instr('Test', null) |
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| int(11) |
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| NULL |
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| | The examples were created with the MyWAY SQL manager: | How to use the INSTR() function in MySQL and MariaDB databases | | In MySQL and MariaDB, the INSTR() function is used to determine the position of a substring within a string. The function returns the index of the first occurrence of the substring within the string, or 0 if the substring was not found. The function can be used for various purposes, such as searching for specific patterns, extracting parts of a string, or performing conditional operations based on the presence or position of a substring. | | 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 |
| | SUBSTR | SUBSTR(String, Position, Length) | | More about SUBSTR 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 |
| | 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 INSTR SQL function: and and |
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