mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-28 18:42:26 +00:00
44 lines
1.2 KiB
SQL
44 lines
1.2 KiB
SQL
DROP TABLE IF EXISTS a;
|
|
DROP TABLE IF EXISTS b;
|
|
DROP TABLE IF EXISTS c;
|
|
DROP TABLE IF EXISTS d;
|
|
|
|
CREATE TABLE a (k UInt64, a1 UInt64, a2 String) ENGINE = Memory;
|
|
INSERT INTO a VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
|
|
|
|
CREATE TABLE b (k UInt64, b1 UInt64, b2 String) ENGINE = Memory;
|
|
INSERT INTO b VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
|
|
|
|
CREATE TABLE c (k UInt64, c1 UInt64, c2 String) ENGINE = Memory;
|
|
INSERT INTO c VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
|
|
|
|
CREATE TABLE d (k UInt64, d1 UInt64, d2 String) ENGINE = Memory;
|
|
INSERT INTO d VALUES (1, 1, 'a'), (2, 2, 'b'), (3, 3, 'c');
|
|
|
|
SET enable_analyzer = 1;
|
|
|
|
-- { echoOn }
|
|
|
|
EXPLAIN PLAN header = 1
|
|
SELECT count() FROM a JOIN b ON b.b1 = a.a1 JOIN c ON c.c1 = b.b1 JOIN d ON d.d1 = c.c1 GROUP BY a.a2
|
|
;
|
|
|
|
EXPLAIN PLAN header = 1
|
|
SELECT a.a2, d.d2 FROM a JOIN b USING (k) JOIN c USING (k) JOIN d USING (k)
|
|
;
|
|
|
|
EXPLAIN PLAN header = 1
|
|
SELECT b.bx FROM a
|
|
JOIN (SELECT b1, b2 || 'x' AS bx FROM b ) AS b ON b.b1 = a.a1
|
|
JOIN c ON c.c1 = b.b1
|
|
JOIN (SELECT number AS d1 from numbers(10)) AS d ON d.d1 = c.c1
|
|
WHERE c.c2 != '' ORDER BY a.a2
|
|
;
|
|
|
|
-- { echoOff }
|
|
|
|
DROP TABLE IF EXISTS a;
|
|
DROP TABLE IF EXISTS b;
|
|
DROP TABLE IF EXISTS c;
|
|
DROP TABLE IF EXISTS d;
|