MySQL String Functions

MySQL provides various built-in string functions to perform different operations on string data. In this article, we will show you the list of MySQL string functions, and an example of each one of them.

MySQL String Functions

The following are the list of MySQL String functions that are available to work with String data.

MySQL String Functions Examples

The following examples helps you to understand these string functions in MySQL

MySQL String Functions Example 1

In this example, we are going to use the ASCII, BIN, and BIT_LENGTH functions.

SELECT ASCII(5), ASCII('T'), ASCII('Tut'), ASCII('a');

SELECT BIN(10), BIN(25), BIN(34), BIN(8), BIN(4);

SELECT BIT_LENGTH('Hi'), BIT_LENGTH('Tutorial');

OUTPUT

MySQL String Functions Example 2

In this example, we used the CHAR, CHAR_LENGTH and CHARACTER_LENGTH functions to find the character for ASCII code, length of a character.

SELECT CHAR(84), CHAR(77, 121, 83, 81, 76), CHAR(72, 105);

SELECT CHAR_LENGTH('Hi'), CHAR_LENGTH('MySQL');

SELECT CHARACTER_LENGTH('Hello'), CHARACTER_LENGTH('Tutorial');

OUTPUT

MySQL String Functions Example 3

In this example, we used the CONCAT and CONCAT_WS functions to concat multiple string values. Next, we used the ELT to find to find the string at specified index.

SELECT CONCAT('Hello', 'World'), CONCAT('Hi', 'All');

SELECT CONCAT_WS(',','Hello', 'World'), CONCAT_WS(',','Hi', 'All');

SELECT ELT(2, 'aa','bb','cc','dd'), ELT(4, 'aa','bb','cc','dd');

OUTPUT

MySQL String Functions Example 4

In this MySQL string functions example, we are going to use the EXPORT_SET, FIELD, and FIND_IN_SET functions.

SELECT EXPORT_SET(5, 'Y', 'N', ',', 4), EXPORT_SET(5, 'Y', 'N', '-', 6);

SELECT FIELD('abc', 'xyz', 'abc', 'Hi', 'you', 'abc');

SELECT FIND_IN_SET('x', 'a,b,c,x,d,e'), FIND_IN_SET('x', 'a,x,c,x,d,e');

OUTPUT

MySQL String Functions Example 5

In this example, we used FORMAT function to format the value, HEX to find the hex value. Next, we used the INSERT function to insert the substring.

SELECT FORMAT(98765.126349, 3), FORMAT(98765.126349, 2, 'ru_RU');

SELECT HEX('Hi'), HEX(25), HEX(255), HEX(495), HEX(1235);

SELECT INSERT('TutorialGateway', 4, 2, 'aaa');

OUTPUT

MySQL String Functions Example 6

In this example, we used this INSTR function to find the index position of a first occurrence of a substring. Next, we used the LCASE to convert the string to lowercase, and LEFT function to find the leftmost characters in a string.

SELECT INSTR('hiabcatabc', 'abc'), INSTR('we abc at abc in xyz', 'abc');

SELECT LCASE('Hi GuYS'), LCASE('MySQL'), LCASE('SUResH');

SELECT LEFT('tutorialgateway', 8), LEFT('tutorialgateway', 12);

OUTPUT

MySQL String Functions Example 7

In this MySQL string functions example, we used LENGTH function to find the string length. Next, we used LOCATE to find the index position of a first occurrence of a substring. Within the last statement, LOWER function is used to convert the given string to lowercase.

SELECT LENGTH('hello'), LENGTH('Hello world');

SELECT LOCATE('at','abcatabc'), LOCATE('abc','we abc at abc in xyz', 7);

SELECT LOWER('HELLO WoRLd'), LOWER('MySQL TUTORIAL'), LOWER('SUResH');

OUTPUT

MySQL String Functions Example 8

In this example of MySQL string functions, we used LPAD to append substring to left side of a string, LTRIM to remove leading spaces. Next, we used RTRIM to remove the tailing spaces.

SELECT LPAD('MySQL', 7, 'Hi'), LPAD('MySQL', 3, 'Hi');

SELECT LTRIM('    Hi'), LTRIM('          MySQL');

SELECT RTRIM('Hello   '), RTRIM('MySQL         ');

OUTPUT

MySQL String Functions Example 9

In this example of MySQL string functions, we used MAKE_SET function, MID and OCT functions.

SELECT MAKE_SET(2, 'aa', 'bb', 'cc'), MAKE_SET(1|3, 'aa', 'bb', 'cc');

SELECT MID('tutorialgateway', 2, 5), MID('tutorialgateway', 5, 13);

SELECT OCT(15), OCT(2), OCT(255);

OUTPUT

MySQL String Functions Example 10

In this example, we used REPEAT function to repeat the string, REPLACE function to replace the string with new string. Next, we used the REVERSE function to reverse the given string.

SELECT REPEAT('MySQL', 2), REPEAT('Hello', 5);

SELECT REPLACE('hello', 'l', 'd'), REPLACE('tutorialgateway', 't', 'AA');

SELECT REVERSE('hello'), REVERSE('MySQL'), REVERSE('Suresh');

OUTPUT

MySQL String Functions Example 11

In this example, we are going to use the RIGHT function to find rightmost characters, RPAD to append substring to right side. Next, we used SOUNDEX to find the soundex value of a given string.

SELECT RIGHT('tutorialgateway', 4), RIGHT('tutorialgateway', 10);

SELECT RPAD('MySQL', 10, 'Hello'), RPAD('MySQL', 3, 'Hi');

SELECT SOUNDEX('Hello'), SOUNDEX('MySQL');

OUTPUT

MySQL String Functions Example 12

In this example, we used the SPACE function to generate empty spaces. Next, we used SUBSTR and SUBSTRING function to return the substring from a given string.

SELECT SPACE(5), CONCAT('Learn', SPACE(2), 'MySQL');

SELECT SUBSTR('tutorialgateway', 9), SUBSTR('MySQL Tutorial', 3, 9);

SELECT SUBSTRING('tutorialgateway', 9), SUBSTRING('MySQL Tutorial', 3, 9);

OUTPUT

MySQL String Functions Example 13

In this example of MySQL string functions, we used the TRIM to remove leading and trailing spaces. Next, UCASE to convert string to Uppercase and SUBSTRING_INDEX to return substring upto index position of a specified delimiter.

SELECT SUBSTRING_INDEX('hi,how are,you', ',', 2);

SELECT TRIM('   hi   '), TRIM(BOTH 'A' FROM 'AAAAhello worldAAAA');

SELECT UCASE('suREsh'), UCASE('TutoriALgatEway');

OUTPUT

MySQL String Functions Example 14

Here, we used the UNHEX to return the string from hex number. Next, we used UPPER to convert the string to uppercase. Last QUOTE statement is used to skip or escape special characters.

SELECT UNHEX('4869'), UNHEX('255'), UNHEX('4D7953514C');

SELECT UPPER('Hi'), UPPER('HeLlo world'), UPPER('mysql');

SELECT QUOTE('Don\'t Worry!');

OUTPUT

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