ClickHouse/docs/tr/engines/table_engines/integrations/jdbc.md
2020-04-15 16:56:49 +03:00

91 lines
2.7 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
machine_translated: true
machine_translated_rev: e8cd92bba3269f47787db090899f7c242adf7818
toc_priority: 34
toc_title: JDBC
---
# JDBC {#table-engine-jdbc}
ClickHouse üzerinden harici veritabanlarına bağlanmak için izin verir [JDBC](https://en.wikipedia.org/wiki/Java_Database_Connectivity).
JDBC bağlantısını uygulamak için ClickHouse ayrı programı kullanır [clickhouse-JDBC-köprü](https://github.com/alex-krash/clickhouse-jdbc-bridge) bu bir daemon olarak çalışmalıdır.
Bu motor destekler [Nullable](../../../sql_reference/data_types/nullable.md) veri türü.
## Tablo oluşturma {#creating-a-table}
``` sql
CREATE TABLE [IF NOT EXISTS] [db.]table_name
(
columns list...
)
ENGINE = JDBC(dbms_uri, external_database, external_table)
```
**Motor Parametreleri**
- `dbms_uri` — URI of an external DBMS.
Biçimli: `jdbc:<driver_name>://<host_name>:<port>/?user=<username>&password=<password>`.
MySQL örneği: `jdbc:mysql://localhost:3306/?user=root&password=root`.
- `external_database` — Database in an external DBMS.
- `external_table` — Name of the table in `external_database`.
## Kullanım Örneği {#usage-example}
Doğrudan konsol istemcisine bağlanarak MySQL sunucusunda bir tablo oluşturma:
``` text
mysql> CREATE TABLE `test`.`test` (
-> `int_id` INT NOT NULL AUTO_INCREMENT,
-> `int_nullable` INT NULL DEFAULT NULL,
-> `float` FLOAT NOT NULL,
-> `float_nullable` FLOAT NULL DEFAULT NULL,
-> PRIMARY KEY (`int_id`));
Query OK, 0 rows affected (0,09 sec)
mysql> insert into test (`int_id`, `float`) VALUES (1,2);
Query OK, 1 row affected (0,00 sec)
mysql> select * from test;
+------+----------+-----+----------+
| int_id | int_nullable | float | float_nullable |
+------+----------+-----+----------+
| 1 | NULL | 2 | NULL |
+------+----------+-----+----------+
1 row in set (0,00 sec)
```
ClickHouse Server'da bir tablo oluşturma ve ondan veri seçme:
``` sql
CREATE TABLE jdbc_table
(
`int_id` Int32,
`int_nullable` Nullable(Int32),
`float` Float32,
`float_nullable` Nullable(Float32)
)
ENGINE JDBC('jdbc:mysql://localhost:3306/?user=root&password=root', 'test', 'test')
```
``` sql
SELECT *
FROM jdbc_table
```
``` text
┌─int_id─┬─int_nullable─┬─float─┬─float_nullable─┐
│ 1 │ ᴺᵁᴸᴸ │ 2 │ ᴺᵁᴸᴸ │
└────────┴──────────────┴───────┴────────────────┘
```
## Ayrıca Bakınız {#see-also}
- [JDBC tablo işlevi](../../../sql_reference/table_functions/jdbc.md).
[Orijinal makale](https://clickhouse.tech/docs/en/operations/table_engines/jdbc/) <!--hide-->