- Data Import
- Client APIs
- Create Table
- Create View
- Create Sequence
- Create Macro
- Alter Table
- Data Types
- Numeric Functions
- Text Functions
- Pattern Matching
- Date Functions
- Date Format
- Timestamp Functions
- Blob Functions
- Window Functions
- Why DuckDB
- Code of Conduct
- Live Demo
EXPORT DATABASE command allows you to export the contents of the database to a specific directory. The
IMPORT DATABASE command allows you to then read the contents again.
-- export the database to the target directory EXPORT DATABASE 'target_directory'; -- export the table contents with the given options EXPORT DATABASE 'target_directory' (FORMAT CSV, DELIMITER '|'); -- export the table contents as parquet EXPORT DATABASE 'target_directory' (FORMAT PARQUET); --reload the database again IMPORT DATABASE 'target_directory'
EXPORT DATABASE command exports the full contents of the database - including schema information, tables, views and sequences - to a specific directory that can then be loaded again. The created directory will be structured as follows:
target_directory/schema.sql target_directory/load.sql target_directory/t_1.csv ... target_directory/t_n.csv
schema.sql file contains the schema statements that are found in the database. It contains any
CREATE VIEW and
CREATE SEQUENCE commands that are necessary to re-construct the database.
load.sql file contains a set of
COPY statements that can be used to read the data from the CSV files again. The file contains a single
COPY statement for every table found in the schema.
The database can be reloaded by using the
IMPORT DATABASE command again, or manually by running
schema.sql followed by
load.sql to re-load the data.