Question

每当使用call_back_date值创建计划时，我都会插入一行 la_id每行都相同，我希望获得最新的max(call_back_date)行我编写了这个查询，在内部连接三个表之后获取这些调度的所有条目：

SELECT
la_details.application_no, 
la_details.id la_det,
la_details.client_id client_id,
la_details.la_name la_name,
la_details.sex sex,
la_details.advisor_name advisor_name,
la_details.client_phone client_phone,
la_details.client_mobile client_mibile,
la_details.level level,
la_details.state state,
la_details.pin_code pin_code,
trans_schedules.id schedule_id, 
trans_schedules.*, 
comments.descriptions
FROM
la_details
INNER JOIN trans_schedules 
ON 
trans_schedules.la_id=la_details.id
INNER JOIN comments  
ON 
comments.comment_id=trans_schedules.comment_id
WHERE
(trans_schedules.comment_id<>'1' 
OR
trans_schedules.list_followup = '1'
OR
trans_schedules.counter_flag='0') 
AND 
la_details.case_closed='0'
ORDER BY 
trans_schedules.call_back_date 
) a1 INNER JOIN 
(
SELECT la_id,MAX(call_back_date) AS call_back_date from
trans_schedules group by la_id                                                               
) b1 on a1.la_det = b1.la_id and a1.call_back_date  = b1.call_back_date

我的问题是如何在先前的查询中使用子查询来获取最大的call_back_date行在此先感谢您的帮助!!!!

Answer 1

对于MySQL：

选择LAST_INSERT_ID（）;

它将为您提供最后插入的身份记录

在内部连接表之后获取更新的日期字段行

1 个答案: