Question

我的数据采用数组格式，例如[1,2,3]如何与另一个表联接。这是我正在尝试的查询：

select  
   RCM.header_details->'auditAssertion'as auditassertion
from masters."RCM" RCM
   left join reference."AUDIT_ASSERTION_APPLICATION" as AAA on AAA.id=RCM.header_details->'auditAssertion'

Answer 1

您可以使用?运算符检查值是否属于json（b）数组：

select m.header_details->'auditAssertion'as auditassertion
from masters.rcm m
left join reference.audit_assertion_application a 
    on m.header_details->'auditAssertion' ? a.id::text

为了提高性能，Postgres将支持以下索引：

create index on masters.rcm using gin ((header_details->'auditAssertion'));

将JSON数组与另一个表连接

1 个答案: