Converting all text in a column to Camel Case in MySql
Solution 1
You need to use the DELIMITER
statement to change the query delimiter. Otherwise, the ;
inside the body ends the CREATE FUNCTION
statement.
DELIMITER $$
CREATE FUNCTION `proper_case`(str varchar(128)) RETURNS varchar(128)
BEGIN
DECLARE n, pos INT DEFAULT 1;
DECLARE sub, proper VARCHAR(128) DEFAULT '';
if length(trim(str)) > 0 then
WHILE pos > 0 DO
set pos = locate(' ',trim(str),n);
if pos = 0 then
set sub = lower(trim(substr(trim(str),n)));
else
set sub = lower(trim(substr(trim(str),n,pos-n)));
end if;
set proper = concat_ws(' ', proper, concat(upper(left(sub,1)),substr(sub,2)));
set n = pos + 1;
END WHILE;
end if;
RETURN trim(proper);
END
$$
DELIMITER ;
Solution 2
concat ( upper(substring(name,1,1)), lower(right(name,length(name)-1)))
Adarsh Madrecha
Techno-savvy Chartered Accountant from India. Specializing in Supply Chain and IT Audits. Founder of Jamku. Interested in following technologies Python, JavaScript, Vue, NodeJs MySQL, MongoDB SAP, MS-Excel, Power Query, PowerBI My other projects Marwari Dictionary GST Return Filing Status Tally Automation (Excel to Tally) I like to code in my free time. while(time === free){ code(); } Got an Idea? for a startup? Looking for Technical Co-Founder? Contact me via Twitter or LinkedIn or adarsh(at)madrecha(dot)com
Updated on August 04, 2022Comments
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Adarsh Madrecha almost 2 years
I was searching for a way to convert all the text which I have in a database to Camel Case / Proper Case
i.e. from
CAMEL HAS LEGS
toCamel Has Legs
I found an answer here, which asks to create a function (below) and then use the function to convert the text.
I am using MySQL Version:
5.6.32-78.1
on a shared hosting server. When I execute the below function, I get error#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 3
How do I rectify this error? I am very new to MySQL
CREATE FUNCTION `proper_case`(str varchar(128)) RETURNS varchar(128) BEGIN DECLARE n, pos INT DEFAULT 1; DECLARE sub, proper VARCHAR(128) DEFAULT ''; if length(trim(str)) > 0 then WHILE pos > 0 DO set pos = locate(' ',trim(str),n); if pos = 0 then set sub = lower(trim(substr(trim(str),n))); else set sub = lower(trim(substr(trim(str),n,pos-n))); end if; set proper = concat_ws(' ', proper, concat(upper(left(sub,1)),substr(sub,2))); set n = pos + 1; END WHILE; end if; RETURN trim(proper); END
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L_J almost 6 yearsWhile this code may answer the question, providing information on how and why it solves the problem improves its long-term value
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Clain Dsilva over 4 years@L_J The answer seems straight forward and not so complicated to give a description, get the first letter make it capital, get the remaining letters and make it small. But this however does not make the whole words in a column camel case in case if there are more than one word.
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clfaster about 4 yearsAfter you define the function you can call it like this:
UPDATE table_name SET "col_name"= proper_case("col_name") WHERE id = 22;
or for all elementsUPDATE table_name SET "col_name"= proper_case("col_name");
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Rohit almost 4 yearsIt just capitalizes the first letter of first word. Not an answer to the question, since it asks for CamelCase.