mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 11:22:12 +00:00
17 lines
446 B
MySQL
17 lines
446 B
MySQL
|
DROP TABLE IF EXISTS t1;
|
||
|
|
|
||
|
|
CREATE TABLE t1
|
||
|
|
(
|
||
|
|
date Date,
|
||
|
|
s1 String,
|
||
|
|
s2 String
|
||
|
|
) ENGINE = MergeTree() PARTITION BY toYYYYMMDD(date) ORDER BY (date, s1)
|
||
|
|
SETTINGS index_granularity = 8192;
|
||
|
|
|
||
|
|
insert into t1 (date, s1,s2) values(today()-1,'aaa','bbb');
|
||
|
|
alter table t1 add column s3 String DEFAULT concat(s2,'_',s1);
|
||
|
|
insert into t1 (date, s1,s2) values(today(),'aaa2','bbb2');
|
||
|
|
select ignore(date), s3 from t1 where s2='bbb';
|
||
|
|
|
||
|
|
DROP TABLE t1;
|