这条联合sql语句哪里错了

Question

((( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,a.customer_code,`follow_up_way` 
FROM gs_log a left join gs_customer b on a.customer_code = b.customer_code WHERE 
( b.customer_code != '' AND b.customer_id = 2212 ) )) union (( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,`customer_code`,`follow_up_way` 
FROM gs_log a left join gs_r_customer_log on a.log_id = gs_r_customer_log.log_id WHERE ( gs_r_customer_log.customer_id= 2212 ) ))) limit 0,10

这条语句哪里错了，半天没找到，错误提示

[SQL]((( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,a.customer_code,`follow_up_way` 
FROM gs_log a left join gs_customer b on a.customer_code = b.customer_code WHERE 
( b.customer_code != '' AND b.customer_id = 2212 ) )) union (( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,`customer_code`,`follow_up_way` 
FROM gs_log a left join gs_r_customer_log on a.log_id = gs_r_customer_log.log_id WHERE ( gs_r_customer_log.customer_id= 2212 ) ))) limit 0,10

[Err] 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 'union (( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,`cus' at line 3

Answer 1

你括号加太多了，相当于最外面那层是(...) limit 0,10,只能是(...) union (...) limit 0,10

(( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,a.customer_code,`follow_up_way` 
    FROM gs_log a left join gs_customer b on a.customer_code = b.customer_code WHERE 
    ( b.customer_code != '' AND b.customer_id = 2212 ) ))
  union 
(( SELECT a.log_id,`create_date`,`content`,`creator`,`belong_to_user`,`customer_code`,`follow_up_way` 
    FROM gs_log a left join gs_r_customer_log on a.log_id = gs_r_customer_log.log_id WHERE ( gs_r_customer_log.customer_id= 2212 ) ))
 limit 0,10

Answer 2

建议分步排查。

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不知道谁选的答案没帮助？分步排查的意思是将大的SQL语句拆分为多个小SQL语句排查。估计是他没有领悟到。