Python Output 雪花连接器到 CSV

Question

I currently am trying to print the output of a snowflake connector query and write it to csv, but I'm having issues doing this. Currently, my code example looks like:

query = '''SELECT TOP 10 * FROM TABLE;'''

conn = snowflake.connector.connect(user='XXXX',
                                   password='XXXX',
                                   account='XXXX')

query_output = conn.cursor().execute(query)

Is there a way for me to print the output of the query, like maybe print(query_output) and then also write it to csv like query_output.to_csv(path) ?

Answer 1

I highly recommend using Pandas ' DataFrames API. Amongst several other data transformation and analysis capabilities, it has an excellent CSV reader and writer implementation that is very flexible .

Snowflake's Python Connector also natively supports transforming results as Pandas DataFrame objects.

A very simple, adapted example is provided below (1 added line):

query = '''SELECT TOP 10 * FROM TABLE;'''

conn = snowflake.connector.connect(user='XXXX',
                                   password='XXXX',
                                   account='XXXX')

query_output = conn.cursor().execute(query)

## You may have to run: pip3 install --user pandas ##

query_output.fetch_pandas_all().to_csv("/path/to/write/table.csv")

The default CSV formatting uses , as the separator, OS-specific newlines ( \n except on Windows, which uses \r\n ), and minimal quoting (auto-quotes VARCHAR columns that carry delimiter characters within them).

Answer 2

You can do like below :
---------------------------------------------------------------

import csv
.....
.....
.....
rows=cur.fetchall()
column_names = [i[0] for i in cur.description]
fp = open('samplefile.csv', 'w')
myFile = csv.writer(fp, lineterminator = '\n')
myFile.writerow(column_names)
myFile.writerows(rows)
fp.close()
.....
.....

Answer 3

You can use this to print the results. To save it in csv, just save the results in a dataframe using for loop and then use df.to_csv

    cursor.execute(query)
    sql_result = cursor.fetchall()
    print(sql_result)     ## just print the results or use the for loop below to print the results row by row 
    for row in sql_result:
        print(row)