I have a MySQL database table 'photos' with a column 'filename'. I need to replace the spaces in the filename column values with underscores. Is it possible with a single/multiple query? If so how?
我有一个MySQL数据库表'photos',列'filename'。我需要用下划线替换filename列值中的空格。是否可以使用单个/多个查询?如果是这样的话?
2 个解决方案
#1
45
You can use the REPLACE
function :
您可以使用REPLACE功能:
REPLACE(str,from_str,to_str)
REPLACE(STR,from_str均被,to_str)
Returns the string
str
with all occurrences of the stringfrom_str
replaced by the stringto_str
.REPLACE()
performs a case-sensitive match when searching forfrom_str
.返回字符串str,其中所有出现的字符串from_str都替换为字符串to_str。搜索from_str时,REPLACE()执行区分大小写的匹配。
So, to replace all occurences of a character by another one in all lines of a table, something like this should do :
因此,要在表的所有行中替换另一个字符的所有出现,这样的事情应该:
update photos set filename = replace(filename, ' ', '_');
ie, you search for ' ' in the column filename
and use '_' instead ; and put the result back into filename
.
即,您在列文件名中搜索''并使用'_'代替;并将结果返回到文件名中。
#2
6
update photos set filename = replace(filename,' ', '_');
#1
45
You can use the REPLACE
function :
您可以使用REPLACE功能:
REPLACE(str,from_str,to_str)
REPLACE(STR,from_str均被,to_str)
Returns the string
str
with all occurrences of the stringfrom_str
replaced by the stringto_str
.REPLACE()
performs a case-sensitive match when searching forfrom_str
.返回字符串str,其中所有出现的字符串from_str都替换为字符串to_str。搜索from_str时,REPLACE()执行区分大小写的匹配。
So, to replace all occurences of a character by another one in all lines of a table, something like this should do :
因此,要在表的所有行中替换另一个字符的所有出现,这样的事情应该:
update photos set filename = replace(filename, ' ', '_');
ie, you search for ' ' in the column filename
and use '_' instead ; and put the result back into filename
.
即,您在列文件名中搜索''并使用'_'代替;并将结果返回到文件名中。
#2
6
update photos set filename = replace(filename,' ', '_');