MySQL 查询未提供所需的输出

Question

I have a MySQL query:

SELECT DATE_FORMAT(pickupdatetime, '%m/%y') AS mmyy,
SUM(CASE WHEN (status = 'Canceled' or 'Unconfirmed' or 'Communicating') and (class = 'local') THEN quotedprice ELSE 0 END) AS potentiallocal,
SUM(CASE WHEN (status = 'Closed' or 'Confirmed' or 'Open') and (class = 'local') THEN quotedprice ELSE 0 END) AS actuallocal,

SUM(CASE WHEN (status = 'Canceled' or 'Unconfirmed' or 'Communicating') and (class = 'travel') THEN quotedprice ELSE 0 END) AS potentialtravel,
SUM(CASE WHEN (status = 'Closed' or 'Confirmed' or 'Open') and (class = 'travel') THEN quotedprice ELSE 0 END) AS actualtravel,

SUM(CASE WHEN (status = 'Canceled' or 'Unconfirmed' or 'Communicating') and (class = 'suv') THEN quotedprice ELSE 0 END) AS potentialsuv,
SUM(CASE WHEN (status = 'Closed' or 'Confirmed' or 'Open') and (class = 'suv') THEN quotedprice ELSE 0 END) AS actualsuv,

SUM(CASE WHEN (status = 'Canceled' or 'Unconfirmed' or 'Communicating') and (class = 'minivan') THEN quotedprice ELSE 0 END) AS potentialminivan,
SUM(CASE WHEN (status = 'Closed' or 'Confirmed' or 'Open') and (class = 'minivan') THEN quotedprice ELSE 0 END) AS actualminivan

FROM `reservations`
WHERE pickuploc = 'la'
GROUP BY DATE_FORMAT(pickupdatetime, '%m/%y'), YEAR(pickupdatetime)
ORDER BY YEAR(pickupdatetime), DATE_FORMAT(pickupdatetime, '%m/%y')

I want to get the combined values of quotedprice for status Canceled , Unconfirmed , and Communicating for local class and then the combined values of quotedprice for status Closed or Confirmed or Open for local class. I am trying to do this again for each class (local, travel, suv, minivan) but it is not giving the correct output, what am I doing wrong?

Answer 1

All the expressions like:

WHEN (status = 'Canceled' or 'Unconfirmed' or 'Communicating')

are wrong, because they are equivalent to:

WHEN (status = 'Canceled' or 0 or 0)

and finally equivalent to just:

WHEN (status = 'Canceled')

because the strings 'Unconfirmed' and 'Communicating' are implicitly converted to integers since they are operands of a boolean expression.
What you should do is change the expressions like:

WHEN (status = 'Canceled' or status = 'Unconfirmed' or status = 'Communicating')

or:

WHEN (status in ('Canceled', 'Unconfirmed', 'Communicating'))