Python list of ints in prepared sql statement

Question

My question is somewhat the same as Python list of String to SQL IN parameter but I have a list of integers. The python code I use is:

ids = [1000032, 100004         


        

Answer 1

you should cast the array of int to array of strings:

",".join(map(str,ids))

Answer 2

IMO a more readable way to build a dynamic query string with placeholders using str.format

ids = [1000032, 1000048]
sql = 'SELECT CompNo, CompName, CompType FROM Component WHERE DeptID IN ({0})' 
sql = sql.format(','.join('?' * len(ids)))
cursor.execute(sql, (ids,))
...

Answer 3

You cannot provide the IN-list as one argument. You need to provide the exact number of place holders in the SQL IN clause, and then provide the array to the execute method:

ids = [1000032, 1000048]
sql = 'SELECT CompNo, CompName, CompType FROM Component WHERE DeptID IN (' \
       + (',?' * len(ids))[1:] + ')'
cursor.execute(sql, ids)