ClickHouse/docs/zh/sql-reference/table-functions/jdbc.md

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43	jdbc

jdbc

jdbc(datasource, schema, table) -返回通过JDBC驱动程序连接的表。

此表函数需要单独的 clickhouse-jdbc-bridge 程序才能运行。 它支持可空类型（基于查询的远程表的DDL）。

示例

SELECT * FROM jdbc('jdbc:mysql://localhost:3306/?user=root&password=root', 'schema', 'table')

SELECT * FROM jdbc('mysql://localhost:3306/?user=root&password=root', 'select * from schema.table')

SELECT * FROM jdbc('mysql-dev?p1=233', 'num Int32', 'select toInt32OrZero(''{{p1}}'') as num')

SELECT *
FROM jdbc('mysql-dev?p1=233', 'num Int32', 'select toInt32OrZero(''{{p1}}'') as num')

SELECT a.datasource AS server1, b.datasource AS server2, b.name AS db
FROM jdbc('mysql-dev?datasource_column', 'show databases') a
INNER JOIN jdbc('self?datasource_column', 'show databases') b ON a.Database = b.name

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