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https://github.com/ClickHouse/ClickHouse.git
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64 lines
1.4 KiB
MySQL
64 lines
1.4 KiB
MySQL
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DROP TABLE IF EXISTS tableCommon;
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DROP TABLE IF EXISTS tableTrees;
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DROP TABLE IF EXISTS tableFlowers;
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CREATE TABLE tableCommon (`key` FixedString(15), `value` Nullable(Int8)) ENGINE = Log();
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CREATE TABLE tableTrees (`key` FixedString(15), `name` Nullable(Int8), `name2` Nullable(Int8)) ENGINE = Log();
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CREATE TABLE tableFlowers (`key` FixedString(15), `name` Nullable(Int8)) ENGINE = Log();
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SELECT * FROM (
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SELECT common.key, common.value, trees.name, trees.name2
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FROM (
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SELECT *
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FROM tableCommon
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) as common
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INNER JOIN (
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SELECT *
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FROM tableTrees
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) trees ON (common.key = trees.key)
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)
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UNION ALL
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(
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SELECT common.key, common.value,
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null as name, null as name2
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FROM (
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SELECT *
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FROM tableCommon
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) as common
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INNER JOIN (
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SELECT *
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FROM tableFlowers
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) flowers ON (common.key = flowers.key)
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);
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SELECT * FROM (
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SELECT common.key, common.value, trees.name, trees.name2
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FROM (
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SELECT *
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FROM tableCommon
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) as common
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INNER JOIN (
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SELECT *
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FROM tableTrees
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) trees ON (common.key = trees.key)
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)
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UNION ALL
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(
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SELECT common.key, common.value,
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flowers.name, null as name2
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FROM (
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SELECT *
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FROM tableCommon
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) as common
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INNER JOIN (
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SELECT *
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FROM tableFlowers
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) flowers ON (common.key = flowers.key)
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);
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DROP TABLE IF EXISTS tableCommon;
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DROP TABLE IF EXISTS tableTrees;
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DROP TABLE IF EXISTS tableFlowers;
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