clickhouseCreate ReplacingMergeTree table
CREATE TABLE rt(id UInt32, ver UInt8, name String) ENGINE = ReplacingMergeTree(ver) ORDER BY idctrl + crtname of the ReplacingMergeTree table to create | id UInt32column to be used as a primary key |
ver UInt8version column (increment it to overwrite row identified by primary key) | name Stringsample string column |
(ver)name of the version column | ORDER BY idprimary key (unique row identification) expression ( |
Usage example
CREATE TABLE rt(id UInt32, ver UInt8, name String) ENGINE = ReplacingMergeTree(ver) ORDER BY id;
INSERT INTO rt VALUES(1, 1, 'Donald');
INSERT INTO rt VALUES(1, 2, 'Joe');
SELECT * FROM rt FINAL;output
┌─id─┬─ver─┬─name─┐
│ 1 │ 2 │ Joe │
└────┴─────┴──────┘More of Clickhouse
- Convert array to rows
- How to execute SQL query from a file
- Get total database size
- How to restart Clickhouse server
- List all tables from all database
- Using variables in queries
- Select where date column is between dates
- Select countIf usage example
- Select sumIf query example
- Get table size
See more codes...