表格數據如下所示。表有時間戳集羣順序遞減,並且主鍵(名字,時間戳): name - address - timestamp
John - J_Addr 1 - Jan 01, 2017
John - J_Addr 2 - Feb 05, 2017
Mark - M_Addr 1 - Jan 01, 2017
Mark - M_Addr 2 - Mar 05, 2017
是否有一種方式來
看完這篇文章:Basic Rules of Cassandra Data Modeling他們說,如果你希望能夠通過電子郵件和用戶名查詢的用戶,你應該讓兩個表: CREATE TABLE users_by_username (
username text PRIMARY KEY,
email text,
age int
)
CREATE TABLE users_b
我嘗試從查詢中插入表格geofield中的多邊形。該表geofield的定義是這樣的: CREATE TABLE geofield(id SERIAL PRIMARY KEY, field GEOMETRY);
insert into geofield(field) values (myfield)
SELECT
'POLYGON(('||cast((select lat from