python if-statement and boolean(how to combine two functions into one)

I 've written two function for each table to receive field's command. And my teammate needs me to remix two function into one. Finally I make this function but it cannot receive my router table 's command. this is my two functions:

# def readrouter(x):
#         conn = sqlite3.connect('server.db')
#         cur = conn.cursor()
#         cur.execute("SELECT DISTINCT command FROM router WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",(x,))
#         read = cur.fetchall()
#         return read;
#
# a = input("x:")
# for result in readrouter(a):
#     print (result[0])

# def readswitch(x):
#         conn = sqlite3.connect('server.db')
#         cur = conn.cursor()
#         cur.execute("SELECT DISTINCT command FROM switch WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",(x,))
#         read = cur.fetchall()
#         return read;

This is my function after combine two function into one:

def readciscodevice(x):
        conn = sqlite3.connect('server.db')
        cur = conn.cursor()
        if x:
                cur.execute(
                        "SELECT DISTINCT command FROM switch WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (x,))
                read = cur.fetchall()
                return read
        else:
                cur.execute(
                        "SELECT DISTINCT command FROM router WHERE   function =? or function='configure terminal' or function='enable'  ORDER BY key ASC",
                        (x,))
                read = cur.fetchall()
                return read;


a = raw_input("x:")
for result in readciscodevice(a):
        print(result[0])

I use my if-statement and it can read my switch table 's command but cannot get commands from switch table. Do I need to write boolean or something else to ensure that it can access my router table?