在本示例中，ECS实例ID为 i-bp14l21sgragk0sp*，云盘ID为 d-bp1hek8q2l5tqzde*，请在实际使用时将对应ID替换为实际值。{"Statement":[{"Action":"ecs:*","Effect":"Allow","Resource":["acs:ecs:*:*:instance/i-bp14l21sgragk0sp*"]},{...
本文将介绍如何使用带namespace和添加filter条件的查询方法，实现类目查询。适用场景介绍 在信息爆炸式增长的时代，各行各业都面临着处理海量数据的挑战，如何在这些数据中迅速找到所需信息成为了一个亟待解决的问题。...
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系统 Q：什么是开放搜索（OpenSearch）？开放搜索（OpenSearch）是为您量身定制打造的针对结构化数据的云端搜索服务。您可以通过我们提供的平台非常容易地拥有高质量，易扩展，可定制的搜索服务而不用关心搜索的各种技术细节。您所需要做的...
Run q22.sql started.","[info]2024-06-28 14:46:13.657|Run q22.sql finished.Time taken:0:00:00,97 ms","[info]2024-06-28 14:46:13.796|Run q2.sql started.","[info]2024-06-28 14:46:13.935|Run q2.sql finished.Time taken:0:00:00,...
L_TAX DECIMAL(15,2)NOT NULL,L_RETURNFLAG text NOT NULL,L_LINESTATUS text NOT NULL,L_SHIPDATE date NOT NULL,L_COMMITDATE date NOT NULL,L_RECEIPTDATE date NOT NULL,L_SHIPINSTRUCT text NOT NULL,L_SHIPMODE text NOT NULL,L_...
CREATE INDEX im_l ON lineitem USING csi(l_orderkey,l_partkey,l_suppkey,l_linenumber,l_quantity,l_extendedprice,l_discount,l_tax,l_returnflag,l_linestatus,l_shipdate,l_commitdate,l_receiptdate,l_shipinstruct,l_shipmode,l_...
token=CAISiQJ1q6Ft5B2yfSjIr5faf47VhLkT2ZHZU1zcrmsyXb*%2F%2Blzz2IHhOf3JuAOoWt%2Fk%2Fm2tY5%2FYTlr14T5hYSXvPas1%2B75tg6g67fYvKtpRYDW%2BcfMT3d1...2hTKWZ4l6Q%3D Status string The generation status of the resource file.Valid values...
With the Origin Certificate feature of ESA,you can configure origin protocol and port,origin certificate verification,and authenticated origin pulls.You can specify the protocol and port used by the ESA point of presence...
返回结果+-+-+|id|_c1|+-+-+|1|3|2|NULL|+-+-+-示例二 SELECT id,BITWISE_XOR_AGG(DISTINCT v)FROM VALUES(1L,2L),(1L,1L),(1L,1L),(2L,NULL),(1L,NULL)t(id,v)GROUP BY id;返回结果+-+-+|id|_c1|+-+-+|1|3|2|NULL|+-+-+
本文为您介绍如何使用Star Schema Benchmark（简称SSB）对OLAP查询场景进行性能测试。...SQL Time(ms)Q1.1 26 Q1.2 20 Q1.3 23 Q2.1 103 Q2.2 53 Q2.3 50 Q3.1 86 Q3.2 46 Q3.3 46 Q3.4 36 Q4.1 83 Q4.2 63 Q4.3 53 Total 688
SELECT ordinal(3L,1L,3L,7L,5L,2L,4L,6L);参数说明 nth：必填，位置序号，起始从1开始。BIGINT类型。指定要返回的位置值为NULL时，返回NULL。var：必填，待排序的值。BIGINT、DOUBLE、DATETIME或STRING类型。返回值说明 排在第 nth 位的值...
效果展示 拆分分区-将 p2019_2020 拆分为 2019 和 2020 两个父分区 ALTER TABLE sales_data REORGANIZE PARTITION p2019_2020 INTO(PARTITION p2019 VALUES LESS THAN(2020)(SUBPARTITION s2019_q1,SUBPARTITION s2019_q2,SUBPARTITION s...
基本问题 Q：云数据库专属集群MyBase 是什么意思？它和RDS数据库的区别是什么？A：云数据库专属集群MyBase 是由多台主机（底层服务器，如ECS I2服务器、神龙服务器）组成的集群，详情请参见 常见术语。相比直接使用RDS 或Redis 实例，专属...
The partition-wise join feature ...as unnecessary joins are reduced.sales_y2023q2,sales_y2023q3,and sales_y2023q4 only need to be joined with measurement_y2023q2,measurement_y2023q3,and measurement_y2023q4 respectively.
The partition-wise join feature ...as unnecessary joins are reduced.sales_y2023q2,sales_y2023q3,and sales_y2023q4 only need to be joined with measurement_y2023q2,measurement_y2023q3,and measurement_y2023q4 respectively.
当开启分区连接后，分布连接优化的效果很明显：sales_y2023q2 只需要和 measurement_y2023q2 连接，sales_y2023q3 只需要和 measurement_y2023q3 连接，sales_y2023q4 只需要和 measurement_y2023q4 连接。分区之间无效的连接被大大减少，...
当开启分区连接后，分布连接优化的效果很明显：sales_y2023q2 只需要和 measurement_y2023q2 连接，sales_y2023q3 只需要和 measurement_y2023q3 连接，sales_y2023q4 只需要和 measurement_y2023q4 连接。分区之间无效的连接被大大减少，...
'ITALY'),SUBPARTITION q2_asia VALUES('INDIA','PAKISTAN'),SUBPARTITION q2_americas VALUES('US','CANADA')),PARTITION q3_2012 VALUES LESS THAN('2012-Oct-01')(SUBPARTITION q3_europe VALUES('FRANCE','ITALY'),SUBPARTITION q3_...
'ITALY'),SUBPARTITION q2_asia VALUES('INDIA','PAKISTAN'),SUBPARTITION q2_americas VALUES('US','CANADA')),PARTITION q3_2012 VALUES LESS THAN('2012-Oct-01')(SUBPARTITION q3_europe VALUES('FRANCE','ITALY'),SUBPARTITION q3_...