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Export to Numpy

The result of a query can be converted to Numpy arrays using the fetchnumpy() function, which returns a dictionary that maps each column name to a Numpy array. For example:

import duckdb
import numpy as np

my_arr = duckdb.sql("SELECT unnest([1, 2, 3]) AS x, 5.0 AS y").fetchnumpy()
my_arr

{'x': array([1, 2, 3], dtype=int32), 'y': array([5., 5., 5.])}

Then, the array can be processed using Numpy functions, e.g.:

np.sum(my_arr['x'])

np.int64(6)

See Also

DuckDB also supports importing from Numpy.

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