SQL Server 2019 : Use from Python2020/01/20 |
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This is an example to use SQL Server from Python.
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| [1] | This is based on the environment Python 3.6 has been installed. Additionally, Install Python DB API for ODBC. |
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[root@dlp ~]# pip install pyodbc
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| [2] | Create a sample User and Database for Test. |
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[root@dlp ~]# sqlcmd -S localhost -U SA Password: # create login user 1> create login cent with PASSWORD= N'password'; 2> go # create [SampleDB] 1> create database SampleDB; 2> go 1> use SampleDB; 2> go Changed database context to 'SampleDB'. # create DB user 1> create user cent for login cent; 2> go # assign DB owner role to [cent] 1> exec sp_addrolemember 'db_owner', 'cent'; 2> go # create [SampleTable] 1> create table SampleTable ( 2> ID int identity(1,1) not null primary key, First_Name NVARCHAR(50), Last_Name NVARCHAR(50) 3> ); 4> insert into SampleTable ( 5> First_Name, Last_Name) values (N'CentOS', N'Linux'), (N'RedHat', N'Linux'), (N'Fedora', N'Linux' 6> ); 7> go |
| [3] | There are some basic usage to connect to SQL Server from Python. |
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# confirm ODBC Driver version [cent@dlp ~]$ odbcinst -j unixODBC 2.3.7 DRIVERS............: /etc/odbcinst.ini SYSTEM DATA SOURCES: /etc/odbc.ini FILE DATA SOURCES..: /etc/ODBCDataSources USER DATA SOURCES..: /home/cent/.odbc.ini SQLULEN Size.......: 8 SQLLEN Size........: 8 SQLSETPOSIROW Size.: 8[cent@dlp ~]$ cat /etc/odbcinst.ini [ODBC Driver 17 for SQL Server] Description=Microsoft ODBC Driver 17 for SQL Server Driver=/opt/microsoft/msodbcsql17/lib64/libmsodbcsql-17.4.so.2.1 UsageCount=1
[cent@dlp ~]$
vi use_mssql.py
import pyodbc
server = '127.0.0.1'
database = 'SampleDB'
username = 'cent'
password = 'password'
cnxn = pyodbc.connect('DRIVER={ODBC Driver 17 for SQL Server}; \
SERVER='+server+'; PORT=1443; DATABASE='+database+'; UID='+username+'; PWD='+ password)
cursor = cnxn.cursor()
# Select from SampleTable
print ('\nReading data from SampleTable')
tsql = "select * from SampleTable;"
with cursor.execute(tsql):
row = cursor.fetchone()
while row:
print (str(row[0]) + " " + str(row[1]) + " " + str(row[2]))
row = cursor.fetchone()
# Insert from SampleTable
print ('\nInserting a new row into SampleTable')
tsql = "insert into SampleTable (First_Name, Last_Name) values (?,?);"
with cursor.execute(tsql,'Ubuntu','Linux'):
print ('- Successfuly Inserted!')
# Update from SampleTable
print ('\nUpdating Last_Name for Redhat')
tsql = "update SampleTable set Last_Name = ? where First_Name = ?"
with cursor.execute(tsql,'Maipo','Redhat'):
print ('- Successfuly Updated!')
tsql = "select * from SampleTable;"
with cursor.execute(tsql):
row = cursor.fetchone()
while row:
print (str(row[0]) + " " + str(row[1]) + " " + str(row[2]))
row = cursor.fetchone()
# Delete from SampleTable
print ('\nDeleting user Ubuntu')
tsql = "delete from SampleTable where First_Name = ?"
with cursor.execute(tsql,'Ubuntu'):
print ('- Successfuly Deleted!')
python use_mssql.py Reading data from SampleTable 1 CentOS Linux 2 RedHat Linux 3 Fedora Linux Inserting a new row into SampleTable - Successfuly Inserted! Updating Last_Name for Redhat - Successfuly Updated! 1 CentOS Linux 2 RedHat Maipo 3 Fedora Linux 5 Ubuntu Linux Deleting user Ubuntu - Successfuly Deleted! |
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