MySQL has many built-in functions. MySQL String Functions reference contains the string, numeric, date, and advanced functions in MySQL.
1. ASCII
Returns the number code that represents the first character.
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SELECT FirstName, ASCII(FirstName) AS NumCodeOfFirstChar FROM Users; |
Result:
| FirstName | NumCodeOfFirstChar |
|---|---|
| 123456 | 49 |
| admin | 97 |
| aakash | 97 |
| jagdish | 106 |
| Ashish | 65 |
| Vishal | 86 |
2. CHAR_LENGTH
Returns the length of the string
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SELECT CHAR_LENGTH("We Answer Website") AS StringLength |
Result:
| StringLength |
|---|
| 17 |
3. CHARACTER_LENGTH
Returns the length of the string
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SELECT CHARACTER_LENGTH("We Answer Website") AS StringLength |
Result:
| StringLength |
|---|
| 17 |
4. CONCAT
Join two or more string together
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SELECT CONCAT("We", "Answer", ".", "xyz") AS Str |
Result:
| Str |
|---|
| WeAnswer.xyz |
5. CONCAT_WS
Join two or more string together and adds a separator between them
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SELECT CONCAT_WS("*", "We", "Answer", "xyz") AS Str |
Result:
| Str |
|---|
| We*Answer*xyz |
6. FIND_IN_SET
return position in a list.
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SELECT FIELD("a", "a", "b", "c", "d", "e") ; Result:1 SELECT FIELD("c", "a", "b", "c", "d", "e") ; Result:3 SELECT FIELD("z", "a", "b", "c", "d", "e") ; Result:0 |
7. FIND_IN_SET
return position a string in a string list.
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SELECT FIND_IN_SET("a", "a,b,c,d,e"); Result:1 SELECT FIND_IN_SET("c", "a,b,c,d,e"); Result:3 SELECT FIND_IN_SET("z", "a,b,c,d,e"); Result:0 |
8. FORMAT
Format the number as a format of “*,***.**”
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SELECT FORMAT(250500.5634, 2); Result: 250,500.56 SELECT FORMAT(250500.5634, 3); Result: 250,500.563 |
9. INSERT
Replace the string with characters:
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SELECT INSERT("weanswer", 1, 2, "xyz"); Result: xyzanswer SELECT INSERT("weanswer", 2, 3, "xyz"); Result: wxyzswer |
10. INSTR
Return substring position
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SELECT INSTR("weAnswer.xyz", "A") AS MatchPosition; Result: 3 SELECT INSTR("wAenswer.xyz", "A") AS MatchPosition; Result: 2 |
11. LCASE
Convert to lower case
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SELECT LCASE("WeAnser.xyz") AS LowercaseText; Result: weanser.xyz SELECT LCASE("WOW") AS LowercaseText; Result: wow |
12. LEFT
Returns sub string from left
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SELECT LEFT("MySQL String Functions", 3) AS ExtractString; Result: MyS SELECT LEFT("MySQL String Functions", 5) AS ExtractString; Result: MySQL |
13. LENGTH
Returns Length of string
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SELECT LENGTH("MySQL String Functions") AS LengthOfString; Result: 22 SELECT LENGTH("MySQL String") AS LengthOfString; Result: 12 |
14. LOCATE
Returns the position of the first occurrence of a substring in a string
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SELECT LOCATE("S", "MySQL String Functions") AS MatchPosition; Result: 3 SELECT LOCATE("S", "MySQL String") AS MatchPosition; Result: 3 |
15. LOWER
Convert to lower case as per LCASE
16. LPAD
Returns a string that is left-padded with a specified string to a certain length
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SELECT LPAD("MySQL String Functions", 30, "ABC"); Result: ABCABCABMySQL String Functions SELECT LPAD("MySQL String Functions", 25, "ABC"); Result: ABCMySQL String Functions |
17. LTRIM
Returns a string that is left- trim
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SELECT LTRIM(" MySQL String Functions") AS LeftTrimmedString; Result: MySQL String Functions SELECT LTRIM(" MySQL String Functions") AS LeftTrimmedString; Result: MySQL String Functions |
18. MID
Returns a string that is position start with and specific position
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SELECT MID("MySQL String Functions", 10, 4) AS ExtractString; Result: L S SELECT MID("MySQL String Functions", 9, 4) AS ExtractString; Result: ring |
19. POSITION
Returns the position of the first occurrence of a substring in a string as per LOCATE
20. REPEAT
Returns a string that repeat number of times
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SELECT REPEAT("MySQL", 3); Result: MySQLMySQLMySQL SELECT REPEAT("MySQL ", 3); Result: MySQL MySQL MySQL |
21. REPLACE
Returns a string that replace by substring
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SELECT REPLACE("MySQL String Functions", "String", "Numeric"); Result: MySQL Numeric Functions SELECT REPLACE("MySQL String Functions", "String", "Advantage"); Result: MySQL Advantage Functions |
22. REVERSE
Returns a string that reverse by a string
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SELECT REVERSE("MySQL String Functions"); Result: snoitcnuF gnirtS LQSyM SELECT REVERSE("MySQL String");; Result:gnirtS LQSyM |
23. RIGHT
Returns sub string from right
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SELECT RIGHT("MySQL String Functions", 4) AS ExtractString; Result: ions SELECT RIGHT("MySQL String Functions",9) AS ExtractString; Result:Functions |
24. RIGHT
Returns a string that is left-padded with a specified string to a certain length
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SELECT RPAD("MySQL String Functions", 30, "ABC"); Result:MySQL String FunctionsABCABCAB SELECT RPAD("MySQL String Functions", 25, "ABC"); Result: MySQL String FunctionsABC |
25. RTRIM
Returns a string that is right- trim
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SELECT RTRIM("MySQL String Functions. ", 30, "ABC"); Result:MySQL String Functions SELECT RPAD("MySQL String Functions. ", 25, "ABC"); Result: MySQL String Functions |
26. SPACE
returns a string with a specified number of spaces.
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SELECT SPACE(10); Result: SELECT SPACE(6); Result: |
27. STRCMP
returns a string compression is true or not.
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SELECT STRCMP("MySQL String Functions", "MySQL String Functions"); Result: 0 SELECT STRCMP("MySQL String Functions", "MySQL String Functions1323"); Result: -1 |
28. SUBSTR
Returns a string that is position start with and specific position as per MID
29. SUBSTRING
Returns a string that is position start with and specific position as per MID
30. SUBSTRING_INDEX
returns a string compression is true or not.
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SELECT SUBSTRING_INDEX("MySQL String Functions", " ", 1); Result: MySQL SELECT SUBSTRING_INDEX("MySQL String Functions", "ing", 1); Result: MySQL Str |
31. SUBSTRING_INDEX
returns a string compression is true or not.
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SELECT SUBSTRING_INDEX("MySQL String Functions", " ", 1); Result: MySQL SELECT SUBSTRING_INDEX("MySQL String Functions", "ing", 1); Result: MySQL Str |
32. TRIM
returns a trim string.
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SELECT TRIM(" MySQL String Functions ") AS TrimmedString; Result: MySQL String Functions SELECT TRIM(" MySQL String Functions ") AS TrimmedString; Result: MySQL String Functions |
33. UCASE
Converts a string to upper-case
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SELECT UCASE("MySQL String Functions") AS UppercaseText; Result: MYSQL STRING FUNCTIONS SELECT UCASE("MySQL") AS UppercaseText; Result: MYSQL |
34. UPPER
Converts a string to upper-case as per UCASE
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