Question

我有这个观点：

myVIEW :( id，percent）

我想提出另一种观点，这将是这样的：

LASTVIEW :( lastID，lastPR，counter）

并且在＆＃34;计数器＆＃34;，在evrey系列中我想知道如何赚钱比这条线的百分比更大。所以我试过了：

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

你几乎就在那里。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

Answer 2

使用以下选择查询创建视图

SELECT lastID,lastPR,counter
FROM (SELECT A.id AS lastID,A.percent AS lastPR,count(B.id) AS counter
FROM myVIEW A,myVIEW B WHERE B.percent<A.percent
GROUP BY A.id,A.percent)

如何在MYSQL中使用COUNT里面的SELECT

2 个答案: