clikchouse
官方文档
https://clickhouse.tech/docs/en/operations/system-tables/tables/
一、关于建表
CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster] ( name1 [type1] [NULL|NOT NULL] [DEFAULT|MATERIALIZED|ALIAS expr1] [compression_codec] [TTL expr1], name2 [type2] [NULL|NOT NULL] [DEFAULT|MATERIALIZED|ALIAS expr2] [compression_codec] [TTL expr2], ... ) ENGINE = engine
https://www.cnblogs.com/uestc2007/p/11022918.html
CLUSTER在SELECT * FROM system.clusters 中取不为system clusters的
https://blog.csdn.net/helunqu2017/article/details/113564324