我会在Infomix
中得到关于我的sql语句的帮助。请在下面找到我的代码。我正在加入5个表并与主键链接。我需要的是,我必须根据export_flag='N'
和country='MA'
将export_flag列更新为Y.
但是现在我遇到了像这样的语法错误
13:34:12 [UPDATE - 0 row(s),0.000 secs] [错误代码:-201,SQL 状态:42000]发生了语法错误。
我无法找到SQL中的问题。
update a set a.export_flag ='Y'
FROM sc_ob_temp_audit AS a
JOIN sc_ob_allocation AS b
ON a.sc_ob_profile_code = b.sc_ob_profile_code
AND a.sc_orig_country= b.sc_orig_country
OUTER JOIN sc_fac_group AS f
ON b.sc_orig_country = f.sc_orig_country
AND b.sc_orig_sf_group_code = f.sc_fac_group_code
OUTER JOIN sc_ob_prod_group AS d, JOIN gbl_produce AS e
ON d.sc_prod_cont_code = e.gp_cnt_cd
AND b.sc_orig_country= d.sc_orig_country
AND b.sc_prod_cont_group_code = d.sc_prod_group_code
WHERE a.sc_orig_country ='MY'
AND a.export_flag='N';
答案 0 :(得分:3)
Informix不支持使用JOIN的那种UPDATE - 请参阅IBM Informix 11.70 InfoCenter处的UPDATE语法。当它遇到无法识别的语法时,它会给出错误-201。
如果Informix不支持使用join进行更新,那么如何加入表?无论如何,我必须稍后将此查询转换为Hibernate。
我现在想进入休眠状态,请...你的意思是,你希望我解释你的查询并找出如何做到这一点?没有表的模式(主键,外键特别相关!)?你肯定要在Hibernate中修复它;我从来没有用过它。
这是您的查询,重新格式化我认为更好的可读性。
UPDATE a
SET a.export_flag ='Y'
FROM sc_ob_temp_audit AS a
JOIN sc_ob_allocation AS b
ON a.sc_ob_profile_code = b.sc_ob_profile_code
AND a.sc_orig_country= b.sc_orig_country
LEFT JOIN sc_fac_group AS f
ON b.sc_orig_country = f.sc_orig_country
AND b.sc_orig_sf_group_code = f.sc_fac_group_code
LEFT JOIN sc_ob_prod_group AS d -- ON clause missing (but there was a comma here)
JOIN gbl_produce AS e
ON d.sc_prod_cont_code = e.gp_cnt_cd
AND b.sc_orig_country= d.sc_orig_country -- Part of missing ON clause?
AND b.sc_prod_cont_group_code = d.sc_prod_group_code -- Part of missing ON clause?
WHERE a.sc_orig_country ='MY'
AND a.export_flag='N';
对于我未经训练的眼睛,这看起来像是一种非常复杂的写作方式:
UPDATE sc_ob_temp_audit
SET export_flag = 'Y'
WHERE sc_orig_country = 'MY'
AND export_flag = 'N'
但是,大概所有连接都会做一些有用的事情,以某种方式限制更新的行集。所以,我们可以猜测它意味着:
UPDATE sc_ob_temp_audit
SET export_flag = 'Y'
WHERE sc_orig_country = 'MY'
AND export_flag = 'N'
AND sc_primary_key IN -- Guessed at column; no schema for the DB; no keys!
(SELECT a.sc_primary_key
FROM sc_ob_temp_audit AS a
JOIN sc_ob_allocation AS b
ON a.sc_ob_profile_code = b.sc_ob_profile_code
AND a.sc_orig_country = b.sc_orig_country
LEFT JOIN sc_fac_group AS f
ON b.sc_orig_country = f.sc_orig_country
AND b.sc_orig_sf_group_code = f.sc_fac_group_code
LEFT JOIN sc_ob_prod_group AS d
ON b.sc_orig_country = d.sc_orig_country
AND b.sc_prod_cont_group_code = d.sc_prod_group_code
JOIN gbl_produce AS e
ON d.sc_prod_cont_code = e.gp_cnt_cd
)
如果实际上您在sc_ob_temp_audit
表上没有单列主键,则必须使用与EXISTS相关的子查询:
UPDATE sc_ob_temp_audit
SET export_flag = 'Y'
WHERE sc_orig_country = 'MY'
AND export_flag = 'N'
AND EXISTS
(SELECT * -- It does not matter what you list here in an EXISTS sub-query
FROM sc_ob_temp_audit AS a
JOIN sc_ob_allocation AS b
ON a.sc_ob_profile_code = b.sc_ob_profile_code
AND a.sc_orig_country = b.sc_orig_country
LEFT JOIN sc_fac_group AS f
ON b.sc_orig_country = f.sc_orig_country
AND b.sc_orig_sf_group_code = f.sc_fac_group_code
LEFT JOIN sc_ob_prod_group AS d
ON b.sc_orig_country = d.sc_orig_country
AND b.sc_prod_cont_group_code = d.sc_prod_group_code
JOIN gbl_produce AS e
ON d.sc_prod_cont_code = e.gp_cnt_cd
WHERE a.pk_column1 = sc_ob_temp_audit.pk_column1
AND a.pk_column2 = sc_ob_temp_audit.pk_column2
AND ...
)
我认为这有机会工作;子查询的WHERE子句应使用a
来标识子查询中的审计表,并使用全名来标识UPDATE语句中的审计表。但是考虑到晚上的时间,我有可能会错误思考。