ClickHouse/dbms/tests/queries/0_stateless/00722_inner_join.sql
2018-09-24 16:55:26 +03:00

61 lines
2.1 KiB
SQL

CREATE DATABASE IF NOT EXISTS test;
DROP TABLE IF EXISTS test.one;
CREATE TABLE test.one(dummy UInt8) ENGINE = Memory;
SELECT x, t.name
FROM (SELECT name, database AS x FROM system.tables) AS t
ALL INNER JOIN (SELECT name AS x FROM system.databases) AS db USING x
WHERE x = 'system' AND t.name = 'one'
FORMAT PrettyCompactNoEscapes;
SELECT x, t.name
FROM (SELECT name, database AS x FROM system.tables) AS t
JOIN (SELECT name AS x FROM system.databases) AS db USING x
WHERE x = 'system' AND t.name = 'one'
SETTINGS join_default_strictness = 'ALL'
FORMAT PrettyCompactNoEscapes;
SET join_default_strictness = 'ALL';
SELECT database, t.name
FROM (SELECT * FROM system.tables) AS t
JOIN (SELECT name, name AS database FROM system.databases) AS db USING database
WHERE db.name = 'system' AND t.name = 'one'
FORMAT PrettyCompactNoEscapes;
--SELECT db.name, t.name
-- FROM (SELECT name, database AS x FROM system.tables) AS t
-- JOIN (SELECT name AS x FROM system.databases) AS db USING x
-- WHERE x = 'system' AND t.name = 'one'
-- FORMAT PrettyCompactNoEscapes;
SELECT t.name --, db.name
FROM (SELECT name, database FROM system.tables WHERE name = 'one') AS t
JOIN (SELECT name FROM system.databases WHERE name = 'system') AS db ON t.database = db.name;
--SELECT db.name, t.name
-- FROM system.tables AS t
-- JOIN (SELECT * FROM system.databases WHERE name = 'system') AS db ON t.database = db.name
-- WHERE t.name = 'one';
SELECT database, t.name
FROM system.tables AS t
JOIN (SELECT name, name AS database FROM system.databases) AS db ON t.database = db.name
WHERE t.name = 'one';
SELECT count(t.database)
FROM (SELECT * FROM system.tables WHERE name = 'one') AS t
JOIN system.databases AS db ON t.database = db.name;
--SELECT count(db.name)
-- FROM system.tables AS t
-- JOIN system.databases AS db ON t.database = db.name
-- WHERE t.name = 'one';
SELECT count()
FROM system.tables AS t
JOIN system.databases AS db ON db.name = t.database
WHERE t.name = 'one';
DROP TABLE test.one;