从mysql中的多行获取单列

Question

i have two rows as show in below image.i want to get it as a single column based on aday(TUE) in the table,please any help me how to workout this. thanks in advance

Answer 1

You can't as that would give variable numbers of columns for the rows returned.

You can do a fiddle with GROUP_CONCAT:-

SELECT doctorname, aday, GROUP_CONCAT(CONCAT_WS('~', availfrom, availupto) SEPARATOR '#') avail_time_slots
FROM sometable
GROUP BY doctname, aday

Then in code you would need to split up the avail_time_slots

Answer 2

This question isn't related to java, but rather SQL queries. You could select all in a table, and only return rows where column aday has the value "TUE".

SELECT * FROM table WHERE aday=TUE