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2.4 KiB
2.4 KiB
Table Functions
Table functions are methods for constructing tables.
You can use table functions in:
-
FROM clause of the
SELECTquery.The method for creating a temporary table that is available only in the current query. The table is deleted when the query finishes. -
CREATE TABLE AS <table_function()> query.
It's one of the methods of creating a table.
!!! warning "Warning" You can’t use table functions if the allow_ddl setting is disabled.
| Function | Description |
|---|---|
| file | Creates a File-engine table. |
| merge | Creates a Merge-engine table. |
| numbers | Creates a table with a single column filled with integer numbers. |
| remote | Allows you to access remote servers without creating a Distributed-engine table. |
| url | Creates a Url-engine table. |
| mysql | Creates a MySQL-engine table. |
| jdbc | Creates a JDBC-engine table. |
| odbc | Creates a ODBC-engine table. |
| hdfs | Creates a HDFS-engine table. |