Cassandra 总接归纳

清空表里的所有数据

Truncate falcon_gps;

TRUNCATE accepts a single argument for the column family name, and permanently removes all data from said column family.

查询Cassandra某表里一空有多少行记录

select count(*) from falcon_gps;

批量导入数据

BEGIN BATCH USING CONSISTENCY QUORUM AND TTL 8640000
INSERT INTO users (KEY, password, name) VALUES (‘user2‘, ‘[email protected]‘, ‘second user‘)
UPDATE users SET password = ‘ps22dhds‘ WHERE KEY = ‘user2‘
INSERT INTO users (KEY, password) VALUES (‘user3‘, ‘[email protected]‘)
DELETE name FROM users WHERE key = ‘user2‘
INSERT INTO users (KEY, password, name) VALUES (‘user4‘, ‘[email protected]‘, ‘Andrew‘)
APPLY BATCH;