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