mysql case else case_value

摘要: mysql case else case_value

mysql case else case_value:

case

case_value

when ...then ... else

case_value

end ...

blob

使用cast(... as ...)转换类型，如下：

select cast(case title

when 1 then 'title1'

when 2 then 'title2'

else title end

as char(20)) as 'title'

from table;

参考：
http://stackoverflow.com/questions/7830506/mysql-case-enumint-when-varchar-else-int-returning-as-blob-how-to-cast-as-a-va