php和mysql使用日期范围无法显示

Question

I had the question for the mysql date between select. In the mysql table, the field is varchar. The date range is '21-01-2013' and '31-01-2013', it can show the records, but the date range is '21-01-2013' and '20-02-2013', it cannot show the records.

"SELECT * from away_from_office where (awaydatefrom between '21-01-2013' and '31-01-2013') ";

Answer 1

you should convert it to date first using STR_TO_DATE , eg.

SELECT * 
from away_from_office 
where awaydatefrom between STR_TO_DATE('21-01-2013', '%d-%m-%Y') and  
                           STR_TO_DATE('31-01-2013', '%d-%m-%Y') 

if the column has the same format with the one you've shown, convert it also

WHERE STR_TO_DATE(awaydatefrom, '%d-%m-%Y') BETWEEN

if you have a chance to alter the table, or you're working with sample records, alter your table by changing the data type of the column to DATE .

Answer 2

Change column datatype to DATE

http://dev.mysql.com/doc/refman/5.1/en/datetime.html