[英]How can I query a jsonb array to find if it contains a value from a query list?
Currently my table looks something like this目前我的桌子看起来像这样
id | companies
----+-------------------------------------------------------------------
1 | {"companies": [{"name": "Google", "industry": "TECH"},
| {"name": "FOX News", "industry": "MEDIA"}]}
----+--------------------------------------------------------------------
2 | {"companies": [{"name": "Honda", "industry": "AUTO"}]}
----+--------------------------------------------------------------------
3 | {"companies": [{"name": "Nike", "industry": "SPORTS"}]}
I want to grab all the rows were the companies
JSONB array contains a company with industry in a the list ["TECH", "SPORTS"]
.如果companies
JSONB 数组在列表["TECH", "SPORTS"]
中包含具有行业的公司,我想获取所有行。
In this example, the query would return rows 1 and 3.在此示例中,查询将返回第 1 行和第 3 行。
I'm unsure of how to do this due to the nesting involved.由于涉及嵌套,我不确定如何执行此操作。
You can use jsonb_array_elements()
and exists
:您可以使用jsonb_array_elements()
并exists
:
select t.*
from mytable t
where exists (
select 1
from jsonb_array_elements(t.companies -> 'companies') x(obj)
where x.obj ->> 'industry' in ('TECH', 'SPORTS')
)
Another way to write this, is to use the contains operator @>
另一种写法是使用包含运算符@>
select *
from the_table t
where t.companies -> 'companies' @> '[{"industry": "TECH"}]'
or t.companies -> 'companies' @> '[{"industry": "SPORTS"}]'
This could make use of a GIN index on companies
这可以利用companies
的 GIN 指数
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