SQL UPDATE语句

我有此查询返回我的ID

select id, default_code from product_product ou

where (select count(*) from product_product inr

where inr.default_code = ou.default_code) > 1 and ou.active = false

但我收到此语句的语法错误

update product_product ou

where (select count(*) from product_product inr

where inr.default_code = ou.default_code) > 1 and ou.active = false set uo.default_code = uo.default_code || 'A';

ERROR: syntax error at or near "where"

LINE 2: where (select count(*) from product_product inr

我如何正确更新从第一条语句中检索到的ID

回答:

正确的:

update

product_product ou

set

default_code = ou.default_code || 'A'

from

(

select default_code

from product_product

group by default_code

having count(*) > 1

) inr

where

not ou.active

and ou.default_code = inr.default_code

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