The CREATE TABLE
command is used create a new table in an existing database.
Here is an example of creating an employee
table in db_how_to
:
CREATE TABLE db_how_to.employee
(
emp_no UInt32 NOT NULL,
birth_date Date NOT NULL,
first_name String NOT NULL,
last_name String NOT NULL,
gender Enum8('M', 'F' ) NOT NULL,
hire_date Date NOT NULL
)
ENGINE = MergeTree()
PRIMARY KEY (emp_no);
Even the simplest of tables in ClickHouse must specify a table engine. There are many engines to choose from, but for a simple table on a single-node ClickHouse server, MergeTree is your likely choice.
The primary key can be defined using the PRIMARY KEY
command.