最近在工作中，我们遇到了一个需求，甲方要求直接从数据库导出一个业务模块中所有使用中的工单信息。为了...
执行查询操作:使用查询代码执行查询操作。根据需求,可以选择使用Scan或Query操作来检索数据。Scan操作会遍历整个表并返回所有符合条件的数据,而Query操作则根据主键和排序键的条件进行查询。 处理查询结果:根据查询操作的返回结果,可以对数据进行进一步处理。例如,可以遍历结果集并提取所需的数据字段,或者对数据进行...
getOrderDetailsByOrderId基表QueryPK=orderId getProductByOrderId基表QueryPK=orderIdSK begins_with "p#" getInvoiceByOrderId基表QueryPK=orderIdSK begins_with "i#" getShipmentByOrderId基表QueryPK=orderIdSK begins_with "sh#" getOrderByProductIdForDateRangeGSI1查询PK=productIddate1 和 date2 之...
getProductByOrderIdBASE 資料表QueryPK=orderIdSK begins_with "p#" getInvoiceByOrderIdBASE 資料表QueryPK=orderIdSK begins_with "i#" getShipmentByOrderIdBASE 資料表QueryPK=orderIdSK begins_with "sh#" getOrderByProductIdForDateRangeGSI1QueryPK=productIdSK between date1 and date2 ...
我们希望达成类似SELECT * FROM Game WHERE Opponent = 'Bob' ORDER BY DATE DESC FILTER ON Status='PENDING'的查询,如果 Bob 的数据有上千条,但 IN_PROGRESS 的数量只有一条,那使用 Query + Filter 的结果是需要查到这千条数据,再从中过滤出需要的数据来。但如果我们使用组合键 StatusDate = Status + Da...
希望达成类似SELECT * FROM Game WHERE Opponent = 'Bob' ORDER BY DATE DESC FILTER ON Status='PENDING'的查询, 如果Bob 的数据有上千条,但 IN_PROGRESS 的数量只有一条,那使用 Query + Filter 的结果是需要查到这千条数据,再从中过滤出需要的数据来。
.all())# query with indexitems = (Movies.query() .where(Movies.year.eq(1992), Movies.title.between('A','L')) .order_by(Movies.rating, asc=False) .all()) 更新项目 item = Movies.get(year=year,title=title) item.update(rank=2467,rating=7.1) ...
Sort orderquery results are always sorted by the sort key value. To reverse the order, set the ScanIndexForward parameter to false.$response = DB::table('Thread') ->keyCondition('ForumName', '=', 'Amazon DynamoDB') ->scanIndexForward(false) ->query();...
Order of query results If the query includes a sort key, then results will be ordered by the sort key. Otherwise the order of query results is undefined. The order can be reversed by setting options.rawQueryOptions.ScanIndexForward: false. static async Model.queryOne(query, options) Query fo...
response = self.table.query( KeyConditionExpression=Key('user_id').eq(user_id) ) order_total = 0 order_amount = 0 discount_amount = 0 for item in response['Items']: order_total += item['order_total'] order_amount += item['total_amount'] ...