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45 lines
3.8 KiB
Markdown
45 lines
3.8 KiB
Markdown
---
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slug: /en/operations/system-tables/databases
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---
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# databases
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Contains information about the databases that are available to the current user.
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Columns:
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- `name` ([String](../../sql-reference/data-types/string.md)) — Database name.
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- `engine` ([String](../../sql-reference/data-types/string.md)) — [Database engine](../../engines/database-engines/index.md).
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- `data_path` ([String](../../sql-reference/data-types/string.md)) — Data path.
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- `metadata_path` ([String](../../sql-reference/data-types/enum.md)) — Metadata path.
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- `uuid` ([UUID](../../sql-reference/data-types/uuid.md)) — Database UUID.
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- `comment` ([String](../../sql-reference/data-types/enum.md)) — Database comment.
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- `engine_full` ([String](../../sql-reference/data-types/enum.md)) — Parameters of the database engine.
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- `database` ([String](../../sql-reference/data-types/string.md)) – Alias for `name`.
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The `name` column from this system table is used for implementing the `SHOW DATABASES` query.
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**Example**
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Create a database.
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``` sql
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CREATE DATABASE test;
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```
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Check all of the available databases to the user.
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``` sql
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SELECT * FROM system.databases;
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```
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``` text
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┌─name────────────────┬─engine─────┬─data_path────────────────────┬─metadata_path─────────────────────────────────────────────────────────┬─uuid─────────────────────────────────┬─engine_full────────────────────────────────────────────┬─comment─┐
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│ INFORMATION_SCHEMA │ Memory │ /data/clickhouse_data/ │ │ 00000000-0000-0000-0000-000000000000 │ Memory │ │
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│ default │ Atomic │ /data/clickhouse_data/store/ │ /data/clickhouse_data/store/f97/f97a3ceb-2e8a-4912-a043-c536e826a4d4/ │ f97a3ceb-2e8a-4912-a043-c536e826a4d4 │ Atomic │ │
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│ information_schema │ Memory │ /data/clickhouse_data/ │ │ 00000000-0000-0000-0000-000000000000 │ Memory │ │
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│ replicated_database │ Replicated │ /data/clickhouse_data/store/ │ /data/clickhouse_data/store/da8/da85bb71-102b-4f69-9aad-f8d6c403905e/ │ da85bb71-102b-4f69-9aad-f8d6c403905e │ Replicated('some/path/database', 'shard1', 'replica1') │ │
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│ system │ Atomic │ /data/clickhouse_data/store/ │ /data/clickhouse_data/store/b57/b5770419-ac7a-4b67-8229-524122024076/ │ b5770419-ac7a-4b67-8229-524122024076 │ Atomic │ │
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└─────────────────────┴────────────┴──────────────────────────────┴───────────────────────────────────────────────────────────────────────┴──────────────────────────────────────┴────────────────────────────────────────────────────────┴─────────┘
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```
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