我有一个表,对于相同的产品ID有两个不同的值:
FROM _term_relationships
object_id term_taxonomy_id
3148 2
3148 179
3149 2
3149 180
如果第二个值为179,我想将第一个值(2)更改为4.
我该怎么做?
我目前正在使用此查询来更改值为2到4的所有term_taxonomy_id字段:
UPDATE
infy_term_relationships
LEFT JOIN infy_posts ON ( infy_term_relationships.object_id = infy_posts.ID )
SET infy_term_relationships.term_taxonomy_id =4
WHERE
infy_posts.post_type = 'product'
AND infy_term_relationships.term_taxonomy_id =2
但是现在我需要一个197的类别值依赖。
答案 0 :(得分:0)
使用记录2和179查找object_id int,并且对于该object_id和term_taxonomy_id等于2将term_taxonomy_id设置为4
drop table if exists t1;
create table t1 (object_id int, term_taxonomy_id int);
insert into t1 values
(3148, 2),
(3148, 179),
(3149, 2),
(3149, 180);
update t1
set term_taxonomy_id = 4
where term_taxonomy_id = 2
and object_id =
(select object_id
from (select object_id
from t1
group by object_id
having concat(',',group_concat(term_taxonomy_id),',') like '%,2,179,%'
) as temp
);
select * from t1