MySQL删除整个列中的所有空格
有没有办法从所有值的特定列中删除所有的空格?
replaceall spaces
:
UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '')
删除tabs
字符:
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\t', '' )
删除所有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
删除列的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
工作查询:
SELECT replace(col_name , ' ','') FROM table_name;
虽然这不:
SELECT trim(col_name) FROM table_name;
由于问题是如何取代所有的空格
UPDATE `table` SET `col_name` = REPLACE (REPLACE(REPLACE(`col_name`, ' ', ''), '\t', ''), '\n', '');
使用下面的查询可以删除MySQL中的前导和尾随空白。
UPDATE `table_name` SET `col_name` = TRIM(`col_name`);
只需使用下面的sql,你就完成了:
SELECT replace('Hi How are you',' ', '') output = HiHowareyou