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MySQL string function
2022-07-06 17:01:00 【My71】
turn ASCII code
function :ASCII( character string )
Instructions
SELECT ASCII("A") AS ASCII code ;
Running results
Statistical string length
function :CHAR_LENGTH( character string )
Instructions
SELECT CHAR_LENGTH("abcde") AS String length ;
Running results
Merge strings
function :CONCAT(s1,s2…sn)
Instructions
SELECT CONCAT("My","SQL") AS Merge strings ;
Running results
Returns the position of the string
function :FIELD(s,s1,s2…)
explain : The return value is a string s stay s1,s2… Position in the list , The starting position is 1
Instructions
SELECT FIELD("a","b","c","a","d") AS To find the character a;
Running results
Character to lowercase
function :LCASE( character string )
Instructions
SELECT LCASE("aBcDeF") AS Turn lowercase ;
Running results
Capitalize characters
function :UCASE( character string )
Instructions
SELECT UCASE("aBcDeF") AS Turn capitalization ;
Running results
Before removal n Characters
function :LEFT( character string , Location )
Instructions
SELECT LEFT("aBcDeF",3) AS Take out the characters ;
Running results
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