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对于超过 5 天的活动，我正在尝试删除多个日志表中的特定行。但如果在 log_customer 中找到了 visitor_id，则希望保留日志活动。

以下返回超过 42 K 行：

SELECT *
FROM `log_url` , `log_url_info`, `log_visitor_info`, `log_visitor`
WHERE `log_url`.`visit_time` <= NOW( ) - INTERVAL 5
DAY
AND `log_url`.`url_id` = `log_url_info`.`url_id` 
AND `log_url`.`visitor_id` = `log_visitor`.`visitor_id`
AND `log_url`.`visitor_id` = `log_visitor_info`.`visitor_id`
AND `log_url`.`visitor_id` NOT IN ( select `log_customer`.`visitor_id` from `log_customer` )

但是，这会返回 sql 1064 错误：

DELETE
FROM `log_url` , `log_url_info`, `log_visitor_info`, `log_visitor`
WHERE `log_url`.`visit_time` <= NOW( ) - INTERVAL 5
DAY
AND `log_url`.`url_id` = `log_url_info`.`url_id` 
AND `log_url`.`visitor_id` = `log_visitor`.`visitor_id`
AND `log_url`.`visitor_id` = `log_visitor_info`.`visitor_id`
AND `log_url`.`visitor_id` NOT IN ( select `log_customer`.`visitor_id` from `log_customer` )

错误信息：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to
your MySQL server version for the right syntax to use near 'WHERE log_url.visit_time 
<= NOW( ) - INTERVAL 5 DAY AND log_url.url_id' at line 3

我也得到...

#1064 - You have an error in your SQL syntax; check the manual that corresponds to 
your MySQL server version for the right syntax to use near 'WHERE log_url.visit_time
<= STR_TO_DATE('2014-08-21 10:00:00', '%Y-%m-%d %H:' at line 3

...如果我将NOW()...替换为<= STR_TO_DATE( '2014-08-21 10:00:00', '%Y-%m-%d %H:%i:%s' )

4

1 回答 1

0

那不应该是...

DELETE `log_url` , `log_url_info`, `log_visitor_info`, `log_visitor`
FROM `log_url` , `log_url_info`, `log_visitor_info`, `log_visitor`
WHERE `log_url`.`visit_time` <= NOW( ) - INTERVAL 5 DAY
AND `log_url`.`url_id` = `log_url_info`.`url_id` 
AND `log_url`.`visitor_id` = `log_visitor`.`visitor_id`
AND `log_url`.`visitor_id` = `log_visitor_info`.`visitor_id`
AND `log_url`.`visitor_id` NOT IN ( select `log_customer`.`visitor_id` from log_customer` )

甚至...

DELETE u 
     , ui
     , vi
     , v
  FROM log_url u
  JOIN log_url_info ui
    ON ui.url_id = u.url_id 
  JOIN log_visitor_info vi
    ON vi.visitor_id = u.visitor_id 
  JOIN log_visitor v
    ON v.visitor_id = u.visitor_id 
 WHERE u.visit_time <= NOW( ) - INTERVAL 5 DAY
   AND u.visitor_id NOT IN ( SELECT visitor_id FROM log_customer)
于 2014-09-02T17:24:53.730 回答