title: Adding a new column to the table in a database using sqlalchemy, pyodbc
body: <pre><code>cnx=sqlalchemy.create_engine("mssql+pyodbc://Omnius:MainBrain1@172.31.163.135:1433/Basis?driver=/opt/microsoft/sqlncli/lib64/libsqlncli-11.0.so.1790.0")
  cnx1 = pyodbc.connect('driver=/opt/microsoft/sqlncli/lib64/libsqlncli-11.0.so.1790.0;server=SRVWUDEN0835;database=Basis;uid=Omnius; pwd=MainBrain1')
  sqlquery = "select top 10 TXN_KEY,SEND_AGENT,PAY_AGENT from Pretty_Txns"
  cursor = cnx1.cursor()
  df = pd.read_sql(sqlquery,cnx)
  model_columns = df.columns.tolist()
   db_columns  = cursor.execute("select TXN_KEY,SEND_AGENT from result").fetchall()
   columns = [column[0] for column in cursor.description]
    to_create =list(set(model_columns) -set(columns))
    for c in to_create:
          a = df[c]
          sql = DDL('ALTER TABLE %s ADD column %s  %s' % (result,a,String(9)))
           cnx.execute(sql)
  
  sqlalchemy.exc.ProgrammingError: (pyodbc.ProgrammingError) ('42000', "[42000] [Microsoft][SQL Server Native Client 11.0][SQL Server]Incorrect syntax near the keyword 'column'. (156) (SQLExecDirectW)") [SQL: u"ALTER TABLE result ADD column ['API352676', 'AED002782', 'ACB020203', 'ASE094882', 'AII071196', 'AHX012817', 'AED000438', 'AEL051943', 'ADJ031448', 'APM033226']  VARCHAR(9)"]
  </code></pre>
  
  <p>Above code shows how to add a new column to a table in a database using sqlalchemy and pyodbc.For the most part it works fine but fails at the last step.</p>