dr0zd
65 lines
1.2 KiB
SQL
65 lines
1.2 KiB
SQL
--task 1
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create table mdrozdov.logs3
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on CLUSTER clickhouse_cluster (
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log_id Int,
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ts DateTime
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)
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engine = ReplicatedMergeTree(
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'/clickhouse/tables/{shard}/mdrozdov/logs3',
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'{replica}'
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)
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order by ts
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alter table mdrozdov.logs3
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add index idx_ts ts type minmax GRANULARITY 2;
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select *
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from mdrozdov.logs3
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where ts between '2024-06-02' and '2024-06-03'
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SELECT
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query,
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read_rows,
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result_rows,
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read_bytes
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FROM system.query_log
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WHERE query LIKE '%logs%'
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ORDER BY event_time DESC
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LIMIT 1;
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-- task 2
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create table mdrozdov.clicks
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on CLUSTER clickhouse_cluster (
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id UInt64,
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country String
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)
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engine = ReplicatedMergeTree(
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'/clickhouse/tables/{shard}/mdrozdov/clicks',
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'{replica}'
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)
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order by id
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alter table mdrozdov.clicks
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add index idx_country country type set(100) GRANULARITY 2
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Explain
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select *
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from mdrozdov.clicks
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where country = 'RU'
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-- task 3
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create table mdrozdov.users
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on CLUSTER clickhouse_cluster (
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id UInt64,
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email String
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)
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engine = ReplicatedMergeTree(
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'/clickhouse/tables/{shard}/mdrozdov/users',
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'{replica}'
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)
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order by id
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ALTER TABLE mdrozdov.users
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ADD INDEX idx_email email TYPE bloom_filter(0.01) GRANULARITY 2;
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SELECT * FROM mdrozdov.users WHERE email = 'alice@mail.com'; |