PostgreSQL之Json类型使用

• 准备数据

建表

create table ay_json_test(
    id varchar primary key,
    name varchar,
    json_value json
)

插入数据：

 insert into ay_json_test values('001','ay','{  
  "ay_name":"阿毅",
  "home":{
      "type":{"interval":
          "5m"
      },
      "love":"now",
      "you":"None"
  },
  "values":{
      "event":["cpu_r","cpu_w"],
      "data":["cpu_r"],
      "threshold":[1,1]
  },
  "objects":{
      "al":"beauty"
  }
}');

查询

select id,name,json_value->>'ay_name' as ayName from ay_json_test where json_value ->>'ay_name' = '阿毅'

select id,name,json_value->>'ay_name' as ayName,json_value ->> 'objects' as objects from ay_json_test 
where json_value ->>'ay_name' = '阿毅'

select json_value -> 'values'#>>'{data,0}' as objects from ay_json_test 
where json_value ->>'ay_name' = '阿毅'

更新数据

update ay_json_test set json_value = '{  
  "ay_name":"阿毅_change",
  "home":{
      "type":{"interval_change":
          "5m"
      },
      "love":"now_change",
      "you":"None_change"
  },
  "values":{
      "event":["cpu_r_change","cpu_w_change"],
      "data":["cpu_r_change"],
      "array":[999,5]
  },
  "objects":{
      "al":"beauty"
  } 
}'
where json_value ->> 'ay_name' = '阿毅'

删除

delete from ay_json_test where json_value ->> 'ay_name' = '阿毅_change'

原文连接：https://blog.csdn.net/huangwenyi1010/article/details/51224886