mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 00:52:02 +00:00
55 lines
1.5 KiB
SQL
55 lines
1.5 KiB
SQL
DROP TABLE IF EXISTS mutation_table;
|
|
CREATE TABLE mutation_table (
|
|
id int,
|
|
price Nullable(Int32)
|
|
)
|
|
ENGINE = MergeTree()
|
|
PARTITION BY id
|
|
ORDER BY id;
|
|
|
|
INSERT INTO mutation_table (id, price) VALUES (1, 100);
|
|
|
|
ALTER TABLE mutation_table UPDATE price = 150 WHERE id = 1 SETTINGS mutations_sync = 2;
|
|
|
|
SELECT * FROM mutation_table;
|
|
|
|
DROP TABLE IF EXISTS mutation_table;
|
|
|
|
|
|
|
|
create table mutation_table ( dt Nullable(Date), name Nullable(String))
|
|
engine MergeTree order by tuple();
|
|
|
|
insert into mutation_table (name, dt) values ('car', '2020-02-28');
|
|
insert into mutation_table (name, dt) values ('dog', '2020-03-28');
|
|
|
|
select * from mutation_table order by dt, name;
|
|
|
|
alter table mutation_table update dt = toDateOrNull('2020-08-02')
|
|
where name = 'car' SETTINGS mutations_sync = 2;
|
|
|
|
select * from mutation_table order by dt, name;
|
|
|
|
insert into mutation_table (name, dt) values ('car', Null);
|
|
insert into mutation_table (name, dt) values ('cat', Null);
|
|
|
|
alter table mutation_table update dt = toDateOrNull('2020-08-03')
|
|
where name = 'car' and dt is null SETTINGS mutations_sync = 2;
|
|
|
|
select * from mutation_table order by dt, name;
|
|
|
|
alter table mutation_table update dt = toDateOrNull('2020-08-04')
|
|
where name = 'car' or dt is null SETTINGS mutations_sync = 2;
|
|
|
|
select * from mutation_table order by dt, name;
|
|
|
|
insert into mutation_table (name, dt) values (Null, '2020-08-05');
|
|
|
|
alter table mutation_table update dt = Null
|
|
where name is not null SETTINGS mutations_sync = 2;
|
|
|
|
select * from mutation_table order by dt, name;
|
|
|
|
|
|
DROP TABLE IF EXISTS mutation_table;
|