MySQL - How to select data by string length

问题

SELECT * FROM table ORDER BY string_length(column);

Is there a MySQL function to do this (of course instead of string_length)?

回答1:

You are looking for CHAR_LENGTH() to get the number of characters in a string.

For multi-byte charsets LENGTH() will give you the number of bytes the string occupies, while CHAR_LENGTH() will return the number of characters.

回答2:

select * from table order by length(column);

Documentation on the length() function, as well as all the other string functions, is available here.

回答3:

Having a look at MySQL documentation for the string functions, we can also use CHAR_LENGTH() and CHARACTER_LENGTH() as well.

回答4:

The function that I use to find the length of the string is length, used as follows:

SELECT * FROM table ORDER BY length(column);

回答5:

I used this sentences to filter

SELECT table.field1, table.field2 FROM table WHERE length(field) > 10;

you can change 10 for other number that you want to filter.

回答6:

select * from *tablename* where 1 having length(*fieldname*)=*fieldlength*

Example if you want to select from customer the entry's with a name shorter then 2 chars.

select * from customer where 1 **having length(name)<2**

来源：https://stackoverflow.com/questions/1870937/mysql-how-to-select-data-by-string-length