Mysql 连接的子查询（位于/存在）

这需要大约29秒的时间来减少…使用join。。。伙计们，请帮帮我。。。o_支票请求的表结构 请求id bigint20无符号非空自动增量， 钱包id int11不为空默认值“0”， 成员id int10未签名非空默认值“0”， 撤回日期默认为空， 金额int10无符号非空默认值“0”， 总金额浮动10,2未签名非空默认值“0.00”， 管理员费用浮动10,2未签名非空默认值“0.00”， tds float10,2无符号非空默认值“0.00”， 10,2无符号非空默认值“0.00”， 净金额浮动10,2无符号非空默认值“0.00”， 撤销类型varchar50默认为空， 银行名称varchar50默认为空， 支票编号varchar50默认为空， courier_name varchar50默认为空， 跟踪\u无varchar50默认为空， 支票\日期默认为“0000-00-00”， 主键请求\u id， 关键成员\u id成员\u id ENGINE=InnoDB默认字符集=latin1自动增量=4738

试试这个

SELECT *, `o_cheque_request.member_id`, `o_cheque_request.wallet_id`
FROM `o_cheque_request`, `o_member`, o_memberinfo`
WHERE `o_cheque_request.member_id` = `o_member.member_id`
AND `o_member.member_id` = `o_memberinfo.member_id`
AND withdraw_date >='2012-07-21'
AND `o_cheque_request.member_id`
IN (SELECT `member_id` FROM `o_cheque_request` GROUP BY `member_id` HAVING SUM(gross_amount ) <=10000)
GROUP BY `o_cheque_request.withdraw_date`, `o_cheque_request.member_id` ORDER BY `request_id` DESC

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29秒取多少条记录？请提供您的表结构。嘿，我在o_check_request表中有4000多个条目…请以适当的方式为三个表提供表结构，以及您在查询中使用的它们的内部关系。每个表都有连接它们的公共字段名member_id感谢您的回复，但出现错误：：您的SQL语法；检查与您的MySQL服务器版本对应的手册，以了解在第1行的“SELECT*，o_check_request.member_id，`o_check_request.wal'附近使用的正确语法

 SELECT * FROM (
        SELECT *, `o_cheque_request.member_id`, `o_cheque_request.wallet_id`
        FROM `o_cheque_request`
        JOIN `o_member` ON `o_cheque_request.member_id` = `o_member.member_id`
        JOIN `o_memberinfo` ON `o_member.member_id` = `o_memberinfo.member_id`
        WHERE withdraw_date >='2012-07-21'
        GROUP BY `o_cheque_request.member_id` HAVING SUM(`o_cheque_request.gross_amount` ) <=10000
    ) AS T
    GROUP BY `withdraw_date`, `member_id` ORDER BY `request_id` DESC