January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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The COPY command
Psycopg 2 is able to execute the COPY command to quickly retrieve big amounts of data from the database or to store data in the database. The copy_to() and copy_from() methods of the cursor class are used, respectively, to copy data to a file-like object from a database table, and from a file-like object to a database table. There is another method, cursor.copy_expert(), that provides more advanced functionality with all the flexibility that the COPY command provides.
The cursor.copy_to() method takes the following parameters:
- file: A file-like object that will receive the data. It can be a file or a StringIO object, or any other object that supports the write() method.
- table: The name of the table to copy.
- sep: A column ...
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