Question

I have a problem with MySQL and Python’s MySQLdb when I try to INSERT more than one variable.

I have a table wordurl with three fields. The first one is an auto_increment ID, second and third should hold the values. Second and third fields are named word_id and url_id.

This is the code.

cursor.execute("INSERT INTO wordurl (word_id, url_id) VALUES (%s, %s)", (word_temp_id, url_temp_id))

When I try to INSERT only one value the code works, two not.

Error message:

(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '),), (('2',),))' at line 1")

I also tried it with tripple ticks around the statement, the variables with and without bracket, without the field names and with the first id field included. I also tried with C-style-printf-stuff % (which isn’t clever!). Nothing worked.

And you, glorious people on stackoverflow, you are my last hope 🙂

MySQL-Server is 5.5.9 on FreeBSD 8.2. Python version is 2.7:82508 on OSX Lion

Thanks in advance!

Steffen

UPDATE: I use cursor.fetchall() and cursor.fetchone() to get the IDs. Maybe this information is important.

Answer 1

Regarding your update:

AFAIK:
fetchall() returns a tuple with tuples inside. Those tuples inside are what you would get from fetchone(). You can image it like

fetchall() = (fetchone(), fetchtwo(), ...)

And fetchone also returns a tuple which has the actual variable values. This is why you can’t simply insert the return value of fetchall().

Just to clarify: the insert statement you pasted, look like this when you fill in the value for max_price:

c.execute("""SELECT spam, eggs, sausage FROM breakfast WHERE price < %s""", (5,))

so the first %s is replaced with the first element of the tuple (5). Your insert statement looks like this:

cursor.execute("INSERT INTO wordurl (word_id, url_id) VALUES (%s, %s)", (((233L,),), ((3L,),)))

I can’t make it more clear.