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clickhouseUsing boolean values


Clickhouse doesn't support Boolean type, but you can use UInt8 (unsigned 1-byte integer) to implement that:

CREATE TABLE tbl (date Date, is_ok UInt8) ENGINE = MergeTree ORDER BY date;
INSERT INTO tbl VALUES(today(), 1); -- 1 for true
INSERT INTO tbl VALUES(today(), 0); -- 0 for false
SELECT * FROM tbl WHERE is_okctrl + c
is_ok

name of the boolean column

UInt8

use unsigned integer to store 1 for true or 0 for false

WHERE is_ok

will filter out rows with is_ok = 0 (false) and show only rows with is_ok = 1 (true)