MySQL视图-性能不佳

Question

I joined a few tables into a view for easier coding. Now when I join a few tables with that view, I get poor performance. While I'm getting more rows in view, the speed of those queries is dramatically decreased. I wrote a lot of code using this view so I don't like the solution to rewrite all of those queries :). Is there any elegant solution to speed up this view when I join it with other tables?

This is one of my queries where tickets_parsed is a view:

SELECT detailValue, SUM(total_tickets) AS total_tickets, SUM(money_in) AS money_in, SUM(handling_charges) AS handling_charges
FROM (
    SELECT bsid, COUNT(*) AS total_tickets, SUM(amount_total) AS money_in, SUM(handling_charges) AS handling_charges
    FROM `bingo`.tickets_parsed
    WHERE tickettime BETWEEN '$date' AND '$date2a'
    AND ticketstatus <> 'CLOSED'
    GROUP BY bsid
    ORDER BY NULL
) AS sub
NATURAL JOIN betshop_details
WHERE detailID = 5
GROUP BY detailValue
ORDER BY NULL

Answer 1

You query uses the view in a sub query, which likely prevents it using indexes. But I am not sure that the sub query is necessary.

You could possibly use something like this:-

SELECT a.detailValue, COUNT(*) AS total_tickets, SUM(b.amount_total) AS money_in, SUM(b.handling_charges) AS handling_charges
FROM bingo.tickets_parsed a
INNER JOIN betshop_details b
ON a.bsid = b.bsid
WHERE a.detailID = 5
AND b.tickettime BETWEEN '$date' AND '$date2a'
AND b.ticketstatus <> 'CLOSED'
GROUP BY a.detailValue
ORDER BY NULL