如何编写CQL以从每行获取最新的数据集?
我正在研究从MSSQL过渡到Cassandra并开始掌握这些概念.很多研究都有很大帮助,但我没有找到答案(我知道必须有办法):
CREATE TABLE WideData {
ID text,
Updated timestamp,
Title text,
ReportData text,
PRIMARY KEY (ID, Updated)
} WITH CLUSTERING ORDER (Updated DESC)
INSERT INTO WideData (ID, Updated, Title, ReportData) VALUES ('aaa', NOW, 'Title', 'Blah blah blah blah')
INSERT INTO WideData (ID, Updated, Title, ReportData) VALUES ('bbb', NOW, 'Title', 'Blah blah blah blah')
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等1分钟:
INSERT INTO WideData (ID, Updated, Title, ReportData) VALUES ('bbb', NOW, 'Title 2', 'Blah blah blah blah')
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等3分钟:
INSERT INTO WideData (ID, Updated, Title, ReportData) VALUES …Run Code Online (Sandbox Code Playgroud)