Amazon Athena lets you query JSON-encoded data, extract data from nested JSON, search for values, and find length and size of JSON arrays. To learn the basics of querying JSON data in Athena, consider the follo
.toList(); -- 第1条sql数据 SELECT t1.`value1` AS `value1`, t1.`value2` AS `value2`, t1.`value3` AS `value3` FROM (SELECT t.`title` AS `value1`, SUM(t.`star`) AS `value2`, MAX(t.`create_time`) AS `value3` ...
Functionjson_valueselects a scalar value from some JSON data, as a SQL value. Functionjson_queryselects one or more values from some JSON data, as a SQL string representing the JSON values. It is used especially to retrieve fragments of a JSON document, typically a JSON object or array....
= request.query; constSQL= 'DELETEFROMuserWHEREuser_id='+data.user_id DB(SQL).then(results=>...; constSQL_ = 'SELECT*FROMuserWHEREuser_name='+JSON.stringify(data.user_name); constSQL 浅谈PB Update Properties 属性 madetodatabase. 此时,我们点击刷新按钮,可以看到,name的值仍为张三。 (4)...
import{useQuery}from'@tanstack/react-query';constfetchTodos=async():Promise<Todo[]>=>{constresponse=awaitfetch('api/tasks');if(!response.ok){thrownewResponseError('Failed to fetch todos',response);}returnawaitresponse.json();};exportconstuseTodos=():UseTodos=>{const{data:todos=[],isLoadin...
method: 'put',data: objPut }) axios({ url: "/nodeApi/put", method: 'put',params: objPut }) 以上就是当Content-type为application/json时所有的请求情况了,现在再回去看文章开头的表格 是不是很清楚了。 2.Content-Type:application/x-www-form-urlencoded篇 ...
select * from test1 ErrorCode string 错误码。 1146 ErrorCount long 错误次数。 10 RequestId string 请求ID。 B6D17591-B48B-4D31-9CD6-9B9796B2*** Success string 请求是否执行成功: true:执行成功。 false:执行失败。 true 示例 正常返回示例 JSON格式 { "Code": 200, "Message": "Successful", ...
Retrieve Data To retrieve data from a collection, send aGETrequest to the collection resource. The following example shows retrieving data from theaccount entity type. This example also demonstrates: Request: HTTP GET [Organization URI]/api/data/v9.2/accounts?$select=name,statecode,statuscode&$ord...
Example 1: Get the JSON object from a JSON string In this example, we require to retrieve the first JSON object from the [employees] key. A variable @data contains an array for the “employees” key We can note the array is enclosed in a square bracket JSON array follows zero-base...
JSONB 空。 记录在聚合周期内,相同聚合主键的查询的duration、memory_bytes、cpu_time_ms、physical_reads、optimization_cost、start_query_cost、get_next_cost等数值字段的MIN、MAX、AVG等统计值。 extended_info JSONB 其他扩展信息。记录Query Queue、Serverless Computing等扩展信息。 serverless_computing_source:表...