I am trying to insert value into SQL SERVER using python.
I wrote my python program as below.
import pyodbc
import subprocess
cnx = pyodbc.connect("DSN=myDSN;UID=myUID;PWD=myPassword;port=1433")
runcmd1 = subprocess.check_output(["usbrh", "-t"])[0:5]
runcmd2 = subprocess.check_output(["usbrh", "-h"])[0:5]
cursor = cnx.cursor()
cursor.execute("SELECT * FROM T_TABLE-A;")
cursor.execute('''
INSERT INTO T_TABLE-A (TEMP,RH,DATE,COMPNAME)
VALUES
(runcmd1,runcmd2,GETDATE(),'TEST_Py')
''')
cnx.commit()
Then get error like below.
# python inserttest.py
Traceback (most recent call last):
File "inserttest.py", line 13, in <module>
''')
pyodbc.ProgrammingError: ('42S22', "[42S22] [FreeTDS][SQL Server]Invalid column name 'runcmd1'. (207) (SQLExecDirectW)")
If I wrote like below, it's OK to insert.
import pyodbc
cnx = pyodbc.connect("DSN=myDSN;UID=myUID;PWD=myPassword;port=1433")
cursor = cnx.cursor()
cursor.execute("SELECT * FROM T_TABLE-A;")
cursor.execute('''
INSERT INTO T_TABLE-A (TEMP,RH,DATE,COMPNAME)
VALUES
(20.54,56.20,GETDATE(),'TEST_P')
''')
cnx.commit()
The command USBRH -t gets temperature and USBRH -h gets humidity. They work well in individual python program.
Does anyone have idea to solve this error?
Thanks a lot in advance.
check the data types returning from these two lines
runcmd1 = subprocess.check_output(["usbrh", "-t"])[0:5]
runcmd2 = subprocess.check_output(["usbrh", "-h"])[0:5]
runcmd1 and runcmd2 should be in 'double' data type since it accepts 20.54.
cursor.execute('''
INSERT INTO T_TABLE-A (TEMP,RH,DATE,COMPNAME)
VALUES
(runcmd1,runcmd2,GETDATE(),'TEST_Py')
''')
won't work because you are embedding the names of the Python variables, not their values. You need to do
sql = """\
INSERT INTO T_TABLE-A (TEMP,RH,DATE,COMPNAME)
VALUES
(?, ?, GETDATE(),'TEST_Py')
"""
cursor.execute(sql, runcmd1, runcmd2)
Related
I am trying to transfer data from postgresql db table to sqlite table using python. Here is my code:
import sqlite3
import csv
connect = sqlite3.connect("server.db")
cursor = connect.cursor()
sql = """CREATE TABLE users (
name TEXT,
id INT,
xp INT
)"""
cursor.execute(sql)
connect.commit()
with open('users.csv', 'r', encoding="utf-8") as f:
no_records = 0
for row in f:
cursor.execute(f"INSERT INTO users (?,?,?)", row.split(','))
connect.commit()
no_records += 1
connect.close()
But when running this script I get sqlite3.OperationalError: near "?": Syntax error:
Traceback (most recent call last):
File "C:\Users\belog\sort_hat\cr.py", line 19, in <module>
cursor.execute(f"INSERT INTO users (?,?,?)", row.split(','))
sqlite3.OperationalError: near "?": syntax error
How to fix it and is it possible to import data is easier without using python?
Your syntax is missing VALUES:
INSERT INTO users VALUES(?,?,?)
EDIT: Yup I'm dumb. Missed the typo.
I'm following along with a video in a Udacity course, and getting an error trying to run a SQL command via psycopg2. The code is identical to the instructor's, but mine returns an error and her's doesnt.
import psycopg2
# establish connection to db
connection = psycopg2.connect('dbname=example')
# cursor is essentially an interface that allows you to start
# cuing up work and transactions
cursor = connection.cursor()
# defines SQL transaction
cursor.execute('''
CREATE TABLE table2 (
id INTEGER PRIMARY KEY,
completed BOOLEAN NOT NULL DEFUALT False
);
''')
cursor.execute('INSERT INTO table2 (id, completed) VALUES (1, true);')
# commits the transaction
connection.commit()
# must manually close your session each time one is opened
connection.close()
cursor.close()
Error:
$ python3 demo.py
Traceback (most recent call last):
File "demo.py", line 11, in <module>
cursor.execute("""
psycopg2.errors.SyntaxError: syntax error at or near "DEFUALT"
LINE 4: completed BOOLEAN NOT NULL DEFUALT False
You seem to have made a typo instead of DEFAULT you have written DEFUALT
cursor.execute('''
CREATE TABLE table2 (
id INTEGER PRIMARY KEY,
completed BOOLEAN NOT NULL DEFAULT False
);
''')
I'm working on a Python script that writes records from a stored procedure to a text file. I'm having issues executing the stored procedure with parameters.
I'm not sure what I could do differently to execute this stored procedure with both parameters. You can see the error I'm getting below.
Any insight would be appreciated.
Here's my code
# Import Python ODBC module
import pyodbc
# Create connection
cnxn = pyodbc.connect(driver="{SQL Server}",server="<server>",database="<database>",uid="<username>",pwd="<password>")
cursor = cnxn.cursor()
# Execute stored procedure
storedProc = "exec database..stored_procedure('param1', 'param2')"
# Loop through records
for irow in cursor.execute(storedProc):
# Create a new text file for each ID
myfile = open('c:/Path/file_' + str(irow[0]) + '_' + irow[1] + '.txt', 'w')
# Write retrieved records to text file
myfile.write(irow[2])
# Close the file
myfile.close()
Here's the error
Traceback (most recent call lst):
File "C:\Path\script.py", line 12, in <module>
for irow in cursor.execute(storedProc):
pyodbc.ProgrammingError: ('42000', "[4200] [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near 'param1'. <102> <SQLExecDirectW>">
I was able to fix the syntax error by removing the parenthesis from the query string.
# Execute stored procedure
storedProc = "exec database..stored_procedure('param1', 'param2')"
should be
# Execute stored procedure
storedProc = "exec database..stored_procedure 'param1','param2'"
This worked for me
query = "EXEC [store_proc_name] #param1='param1', #param2= 'param2'"
cursor.execute(query)
For SQL Server:
cursor.execute('{call your_sp (?)}',var_name)
I'm getting the following error:
Traceback (most recent call last):
File "/home/pi/Nike/test_two.py", line 43, in <module>
do_query()
File "/home/pi/Nike/test_two.py", line 33, in do_query
for(Product,Bin,Size,Color) in records:
ValueError: too many values to unpack
Code:
def do_query():
connection = sqlite3.connect('test_db.db')
cursor = connection.cursor()
cursor.execute("SELECT * FROM TESTER ORDER BY CheckNum")
records = cursor.fetchall()
for(Product,Bin,Size,Color) in records:
row_1.append(Product)
row_2.append(Bin)
row_3.append(Size)
row_4.append(Color)
connection.commit()
cursor.close()
connection.close()
do_query()
I'm trying to load each column of a table into seperate python list. I am using Python, and sqlite3. Why am I getting this error?
You are using "SELECT *" which will return every column from the table. My guess is that the table in question contains more columns then the 4 you specified.
A better way would actually be specifying in the SQL which columns you want so that your code will not break if columns are added to the database.
Something like "SELECT col1, col2 FROM table"
You can run the sqlite3 tool on the db file and then view the table schema with ".schema <table_name>"
after searching untill madness, i decided to post a question here.
I try to create a sqlite3 database where i'd like to make use of the secure variable substituation function of the cursor.execute(SQL, param) function. My function goes like this:
#!/usr/bin/env python3
#-*- coding: utf-8 -*-
import sqlite3
def create():
values = ("data")
sql = "CREATE TABLE IF NOT EXISTS ? ( name TEXT, street TEXT, time REAL, age INTEGER )"
con = sqlite3.connect("database.db")
c = con.cursor()
c.execute(sql, values)
con.commit()
c.close()
con.close()
if __name__ = "__main__":
create()
I know that the first argument should be the sql command in form of a string and the second argument must be a tuple of the values which are supposed to be substituted where the ? is in the sql string.
However, when i run the file it returns the following error:
$ ./test.py
Traceback (most recent call last):
File "./test.py", line 21, in <module>
create()
File "./test.py", line 14, in create
c.execute(sql, values)
sqlite3.OperationalError: near "?": syntax error
This also happens when paramstyle is set to named (e.g. the :table form).
I can't spot a syntax error here, so i think that the problem must be caused somewhere in the system. I tested it on an Archlinux and Debian install, both post me the same error.
Now it is up yo you, as I have no idea anymore where to look for the cause.
SQL parameters can only apply to insert data, not table names. That means parameters are not even parsed for DDL statements.
For that you'll have to use string formatting:
sql = "CREATE TABLE IF NOT EXISTS {} ( name TEXT, street TEXT, time REAL, age INTEGER )".format(*values)
As I understand, your parameter is the table name?
so your command would be
tbl = 'my_table'
sql = "CREATE TABLE IF NOT EXISTS '%s' ( name TEXT, street TEXT, time REAL, age INTEGER )" % tbl