MySQL從整列中刪除所有空格

Question

是否有辦法從所有值的特定列中刪除所有空格？

Answer 1

用於替換all spaces：

UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '') 

用於刪除所有tabs字符：

UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\t', '') 

用於刪除所有new line字符：

UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\n', '') 

http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace

列的刪除first and last space(s)：

UPDATE `table` SET `col_name` = TRIM(`col_name`) 

http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_trim

Answer 2

工作查詢：

SELECT replace(col_name , ' ','') FROM table_name;

雖然這並不：

SELECT trim(col_name) FROM table_name;

Answer 3

使用下面的查詢可以刪除MySQL中的前導和尾隨空白。

UPDATE `table_name` 
SET `col_name` = TRIM(`col_name`); 

Answer 4

是使用下面的SQL語句，你做：

SELECT replace('Hi How are you',' ', '') 
output = HiHowareyou 

Answer 5

由於問題是如何取代所有空格

UPDATE `table` 
SET `col_name` = REPLACE 
(REPLACE(REPLACE(`col_name`, ' ', ''), '\t', ''), '\n', '');