从数据库中查询 python 中 sql 条件的数据

Question

just a small problem I have. What I am trying to do is get both column names and data from a database, using a function which returns two values just like return columns, data . The problem that I have is outputting the data. Using the following code

for column in build_sql.show_employee_id(registered_employee[0])[1]:
 for detail in [b for b in build_sql.show_employee_id(registered_employee[0])[0].fetchall()]:
  print(column, ":", detail)

the print is

Name : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
Surname : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
HiredDate : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
PhoneNumber : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
Email : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
Address : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
Position : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')
BadgeID : ('Andrei', 'Cioban', '09:28:32 (19.12.2020)', 352395729385723, 'wfoaF@fwaic.com', 'AWiofOAWFLAWiufnLIAWUfnliaIUFAWi', 'Employee', '411372')

but I want it to be something like

Name: Andrei
Surname: Cioban
# and so on

Edit: This is the sqlite3 code that queries the data:

def show_employee_id(ide):
    employee = connection.execute('SELECT Name, Surname, HiredDate, PhoneNumber, Email, Address, Position, BadgeID FROM employees WHERE ID = ?;', (ide,))
    columns = [description[0] for description in employee.description]
    return employee, columns

How can I do this? What I've tried doesn't work. I don't understand why it prints a tuple after I looped through the tuple return with the data from the database.

Answer 1

fetchall() gets you a list of the rows in your database.

So the comprehension list will just contain every tuple returned by fecthall() (meaning it is useless and you could just have written for detail in fetchall() .

As a result, detail will take values from a list of tuple, so in each loop iteration, detail will be a row of your database.

Maybe you could iterate over the fetchall() result with for row in fetchall and print what you want using a loop on the columns or a formated string.