I am using Python 2.7 and pyodbc to talk to a Postgresql database. The execute statement freezes and does not return when I use prepared statement. If I use straight sql then it works fine. Any ideas?
Here is what I have in code:
DBconn = pyodbc.connect("DSN=devDB;UID=dev;PWD=dev", autocommit=True)
cursor = DBconn.cursor()
sql = """ select distinct age from user where name = (?) """
params = ('john',)
cursor.execute(sql, params)
#works fine
#sql = """ select distinct age from user where name = 'john' """
#cursor.execute(sql)
row = cursor.fetchone()
print(row)
cursor.close()
DBconn.close()
PS: This query should only return one row and there is data is really small.
Related
I am new in this and this is my first question. I hope you guys will help.
If my question format is wrong, feel free to comment on that also.
The code is pretty simple. I have DB connection, 2 functions - one for printing and another for choosing how many SQL queries I want to execute and input for those queries.
Idea is to enter a number(INT) of SQL queries - for example, 2 and then in another line user must enter 2 SQL queries.
After that, call_table function will print out current table status/situation/data.
For example - user wants to print out into console table data (table have 2 columns, [name][college], varchar type)
Insert a number of SQL queries you want to execute: 1
Insert SQL statement:
select * from student
('ivan', 'ino')
('nena', 'fer')
('tomislav', 'ino')
('marko', 'fer')
('tomislav', 'ino')
('marko', 'fer')
When I try to insert some values into the same table nothing happens with the table, data is not entered.
The query is 100% correct since I tested it in workbench, also I've tried to create another table from this program and the query was executed normally and the table was created.
I receive no errors.
Code is below:
import pymysql
db = pymysql.connect(host='localhost', user='root', passwd='123456', database='test')
mycursor = db.cursor()
def call_table(data_print):
for i in data_print:
print(i)
def sql_inputs(cursor):
container = []
no = int(input("Insert a number of SQL queries you want to execute: "))
for i in range(no):
container = [input("Insert SQL statement: \n").upper()]
for y in container:
cursor.execute(y)
sql_inputs(mycursor)
call_table(mycursor)
What am I doing wrong?
I tried even more complicated SQL queries but insert into the table is not working.
Thank you
Everything is good with the code, you're just missing cursor.commit()
By default cursor commit is false in python for insert queries.
cursor.execute(y)
cursor.commit()
and if you're done with queries
db.close()
You should append the queries to the container variable
import pymysql
db = pymysql.connect(host='localhost', user='root', passwd='123456', database='test')
mycursor = db.cursor()
def call_table(data_print):
for i in data_print:
print(i)
def sql_inputs(cursor):
container = []
no = int(input("Insert a number of SQL queries you want to execute: "))
for i in range(no):
container.append(input("Insert SQL statement: \n").upper())
for y in container:
cursor.execute(y)
sql_inputs(mycursor)
call_table(mycursor)
At the end of the program, I've added db.commit(), and everything works fine now.
import pymysql
db = pymysql.connect(host='localhost', user='root', passwd='45fa6cb2',
database='ivan')
mycursor = db.cursor()
def call_table(data_print):
for i in data_print:
print(i)
def sql_inputs(cursor):
container = []
no = int(input("Insert a number of SQL queries you want to execute: "))
for i in range(no):
container.append(input("Insert SQL statement: \n").upper())
for y in container:
cursor.execute(y)
sql_inputs(mycursor)
db.commit()
call_table(mycursor)
I'm working with python and using pymysql library and i want to write a query that insert an array in a line where a column has some special value.
For example insert 'hi' into a column where user_id is 22
for that query i write this code
from pymysql import *
chat_id = 22
user_first_name = "hi"
db = connect(host="localhost", port=3306, user="root", passwd="",
db='support',charset='utf8')
cursor = db.cursor()
cursor.execute("""INSERT INTO users user_firstname VALUE %s WHERE user_id is
%s""",(user_first_name, chat_id))
db.commit()
how should i write this query in correct form?
If I'm undertanding, correctly, rather than an INSERT INTO, it seems you need an UPDATE:
cursor.execute("""UPDATE users SET user_firstname='%s' WHERE user_id=%s""",(user_first_name, chat_id))
Francisco is right though. If you have a user_id already, then an UPDATE should be used to change the value of and existing record. The INSERT command, creates a new record.
So, after coding with pyodbc for a couple days now, I've run into a road block it seems. My SQL update will not work, even after putting autocommit=True in the connection statement. Nothing changes in the database at all. All my code is provided below. Please help. (I am using the 2016 version of MS Access, code runs with no errors, 32 bit Python and Access.)
import pyodbc
# Connect to the Microsoft Access Database
conn_str = (
r'DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};'
r'DBQ=C:\Users\User_Name\Desktop\Databse\CPLM.accdb'
)
cnxn = pyodbc.connect(conn_str, autocommit=True)
crsr = cnxn.cursor()
crsr2 = cnxn.cursor()
# SQL code used for the for statement
SQL = "SELECT NameProject, Type, Date, Amount, ID FROM InvoiceData WHERE Type=? OR Type=? OR Type IS NULL AND ID > ?"
# Defining variables
date = ""
projectNumber = 12.04
numberDate = []
# Main Code, for each row in the SQL query, update the table
for row in crsr.execute(SQL, "Invoice", "Deposit", "1"):
print (projectNumber)
if row.NameProject is not None:
crsr2.execute("UPDATE Cimt SET LastInvoice='%s' WHERE Num='%s'" % (date, projectNumber))
cnxn.commit()
# Just used to find where to input certain data.
# I also know all the code in this if statement completes due to outside testing
projectNumber = row.NameProject[:5]
numberDate.append([projectNumber, date])
else:
date = row.Date
print(numberDate)
crsr.commit()
cnxn.commit()
cnxn.close()
So I have a mysql table and I am trying to take each element from one of the fields of the table. The field and table are both called "keywords". In the field there are many different random words and I am trying to take all of those and save them to a text file. Any help on how to implement this would be great, here is what I have so far.
#!/usr/bin/env python
import MySQLdb
db = MySQLdb.connect(host="", user="", passwd="", db="")
cursor = db.cursor()
sql = """SELECT DISTINCT keywords FROM keywords"""
cursor.execute(sql)
cursor.fetchall()
db.close()
for s in sql:
tweets = open("keywords.txt", "w")
What I was thinking is to turn what sql fetches into a list if possible and write that to the file. But I am open to any suggestions, thanks.
Something like this should work:
import MySQLdb
db = MySQLdb.connect(host="", user="", passwd="", db="")
cursor = db.cursor()
sql = """SELECT DISTINCT keywords FROM keywords"""
tweets = open("keywords.txt", "w")
cursor.execute(sql)
for row in cursor:
print>>tweets, row[0]
tweets.close()
db.close()
I have a python SQL query which is intended to call a procedure and then return that query in results however with the below code I only get this output:
adodbapi.adodbapi._SQLrows object at 0x0000000004CDE278
instead of it selecting the rows and data that it should be grabbing, I don't know anything about SQL and limited python so be gentle :)
# Connect to the SQL DB
conn = adodbapi.connect("Provider=SQLOLEDB; SERVER=xx.x.x.x; Initial Catalog=master_db;User Id=User; Password=Pass; ")
curs = conn.cursor()
# Execute SQL procedure "
curs.execute('util.referencing_procedure', )
results = curs.fetchall()
print results
conn.close()
You need to iterate through the results. Probably:
for row in results:
print row