mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 09:02:00 +00:00
22 lines
594 B
SQL
22 lines
594 B
SQL
DROP TABLE IF EXISTS test_new_col;
|
|
|
|
CREATE TABLE test_new_col
|
|
(
|
|
`_csv` String,
|
|
`csv_as_array` Array(String) ALIAS splitByChar(';',_csv),
|
|
`csv_col1` String DEFAULT csv_as_array[1],
|
|
`csv_col2` String DEFAULT csv_as_array[2]
|
|
)
|
|
ENGINE = MergeTree
|
|
ORDER BY tuple();
|
|
|
|
INSERT INTO test_new_col (_csv) VALUES ('a1;b1;c1;d1'), ('a2;b2;c2;d2'), ('a3;b3;c3;d3');
|
|
|
|
SELECT csv_col1, csv_col2 FROM test_new_col ORDER BY csv_col1;
|
|
|
|
ALTER TABLE test_new_col ADD COLUMN `csv_col3` String DEFAULT csv_as_array[3];
|
|
|
|
SELECT csv_col3 FROM test_new_col ORDER BY csv_col3;
|
|
|
|
DROP TABLE IF EXISTS test_new_col;
|