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What is the proper wayto execute dynamic MySQL queries in Python

0 votes
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What is the proper way in which I can execute dynamic MySQL queries in Python? I want to do dynamic queries for both CREATE and INSERT statement.
Here is my attempted code:

sql="create table %s (%%s, %%s, %%s ... )" % (tablename,''.join(fields)+' '.join(types))
cur.execute(sql) 

where 'field' is the fieldnames stored in a list and 'types' are the fieldtypes stored in a list.

posted May 29, 2013 by anonymous

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1 Answer

0 votes

You need to join the fields and the field types. Use zip(). Then join with commas.

fields_and_types = [%s %s % (field, type) for field, type in zip(fields, types)] 
what_goes_between_the_parens = , .join(fields_and_types) 
sql = create table %s (%s) % (tablename, what_goes_between_the_parens) 

See where that gets you.

answer May 29, 2013 by anonymous
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What I have tried

import MySQLdb
db = MySQLdb.connect(host="localhost",
                     user="root", # username
                      passwd="xxxxx", #  password
                      db="TEST") # name of the data base

Even tried 127.0.0.1 as local host

#ERROR
Traceback (most recent call last):
  File "C:/Python27/connect.py", line 6, in <module>
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  File "C:\Python27\lib\site-packages\MySQLdb\__init__.py", line 81, in Connect
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  File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 187, in __init__
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