mysql - 如何在 MYSQL 的 COUNT 中使用 SELECT

Question

我的看法是:

我的 View :(id，百分比)

我想再做一个 View ，会是这样的:

LASTVIEW:(lastID、lastPR、计数器)

在“计数器”中，在每一行中，我都希望货币 id 的百分比大于该行的百分比。所以我尝试了:

CREATE VIEW LASTVIEW(lastID, lastPR, counter) AS
SELECT id AS lastID, percent AS lastPR
COUNT (SELECT id FROM myVIEW WHERE percent < lastPR) AS counter,
FROM myVIEW;

Answer 1

你快到了。试试这个:

SELECT id AS lastID, percent AS lastPR, (SELECT Count(id) 
FROM myVIEW bigger 
WHERE bigger.percent > myv.percent) AS counter
FROM myVIEW myv