In this video I’ll show you how to delete everything from our Database Table with the DROP TABLE command.
The fastest and easiest way to delete all the records from our database table is to use the Drop Table Command.
Watch out though, this will permanently delete everything in the table, so we’ll make a backup first!
After we delete all the records and drop the table, we’ll need to recreate the table structure so that we can continue to add new customers in the future.
We’ll also create a popup box that asks the user if they’re sure they want to delete everything from the table.
Python Code: treebase.py
(Github Code)
from tkinter import *
from tkinter import ttk
from tkinter import messagebox
import sqlite3
root = Tk()
root.title('Codemy.com - TreeBase')
root.iconbitmap('c:/gui/codemy.ico')
root.geometry("1000x500")
# Add Fake Data
'''
data = [
["John", "Elder", 1, "123 Elder St.", "Las Vegas", "NV", "89137"],
["Mary", "Smith", 2, "435 West Lookout", "Chicago", "IL", "60610"],
["Tim", "Tanaka", 3, "246 Main St.", "New York", "NY", "12345"],
["Erin", "Erinton", 4, "333 Top Way.", "Los Angeles", "CA", "90210"],
["Bob", "Bobberly", 5, "876 Left St.", "Memphis", "TN", "34321"],
["Steve", "Smith", 6, "1234 Main St.", "Miami", "FL", "12321"],
["Tina", "Browne", 7, "654 Street Ave.", "Chicago", "IL", "60611"],
["Mark", "Lane", 8, "12 East St.", "Nashville", "TN", "54345"],
["John", "Smith", 9, "678 North Ave.", "St. Louis", "MO", "67821"],
["Mary", "Todd", 10, "9 Elder Way.", "Dallas", "TX", "88948"],
["John", "Lincoln", 11, "123 Elder St.", "Las Vegas", "NV", "89137"],
["Mary", "Bush", 12, "435 West Lookout", "Chicago", "IL", "60610"],
["Tim", "Reagan", 13, "246 Main St.", "New York", "NY", "12345"],
["Erin", "Smith", 14, "333 Top Way.", "Los Angeles", "CA", "90210"],
["Bob", "Field", 15, "876 Left St.", "Memphis", "TN", "34321"],
["Steve", "Target", 16, "1234 Main St.", "Miami", "FL", "12321"],
["Tina", "Walton", 17, "654 Street Ave.", "Chicago", "IL", "60611"],
["Mark", "Erendale", 18, "12 East St.", "Nashville", "TN", "54345"],
["John", "Nowerton", 19, "678 North Ave.", "St. Louis", "MO", "67821"],
["Mary", "Hornblower", 20, "9 Elder Way.", "Dallas", "TX", "88948"]
]
'''
# Do some database stuff
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
# Create Table
c.execute("""CREATE TABLE if not exists customers (
first_name text,
last_name text,
id integer,
address text,
city text,
state text,
zipcode text)
""")
# Add dummy data to table
'''
for record in data:
c.execute("INSERT INTO customers VALUES (:first_name, :last_name, :id, :address, :city, :state, :zipcode)",
{
'first_name': record[0],
'last_name': record[1],
'id': record[2],
'address': record[3],
'city': record[4],
'state': record[5],
'zipcode': record[6]
}
)
'''
# Commit changes
conn.commit()
# Close our connection
conn.close()
def query_database():
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
c.execute("SELECT rowid, * FROM customers")
records = c.fetchall()
# Add our data to the screen
global count
count = 0
#for record in records:
# print(record)
for record in records:
if count % 2 == 0:
my_tree.insert(parent='', index='end', iid=count, text='', values=(record[1], record[2], record[0], record[4], record[5], record[6], record[7]), tags=('evenrow',))
else:
my_tree.insert(parent='', index='end', iid=count, text='', values=(record[1], record[2], record[0], record[4], record[5], record[6], record[7]), tags=('oddrow',))
# increment counter
count += 1
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Add Some Style
style = ttk.Style()
# Pick A Theme
style.theme_use('default')
# Configure the Treeview Colors
style.configure("Treeview",
background="#D3D3D3",
foreground="black",
rowheight=25,
fieldbackground="#D3D3D3")
# Change Selected Color
style.map('Treeview',
background=[('selected', "#347083")])
# Create a Treeview Frame
tree_frame = Frame(root)
tree_frame.pack(pady=10)
# Create a Treeview Scrollbar
tree_scroll = Scrollbar(tree_frame)
tree_scroll.pack(side=RIGHT, fill=Y)
# Create The Treeview
my_tree = ttk.Treeview(tree_frame, yscrollcommand=tree_scroll.set, selectmode="extended")
my_tree.pack()
# Configure the Scrollbar
tree_scroll.config(command=my_tree.yview)
# Define Our Columns
my_tree['columns'] = ("First Name", "Last Name", "ID", "Address", "City", "State", "Zipcode")
# Format Our Columns
my_tree.column("#0", width=0, stretch=NO)
my_tree.column("First Name", anchor=W, width=140)
my_tree.column("Last Name", anchor=W, width=140)
my_tree.column("ID", anchor=CENTER, width=100)
my_tree.column("Address", anchor=CENTER, width=140)
my_tree.column("City", anchor=CENTER, width=140)
my_tree.column("State", anchor=CENTER, width=140)
my_tree.column("Zipcode", anchor=CENTER, width=140)
# Create Headings
my_tree.heading("#0", text="", anchor=W)
my_tree.heading("First Name", text="First Name", anchor=W)
my_tree.heading("Last Name", text="Last Name", anchor=W)
my_tree.heading("ID", text="ID", anchor=CENTER)
my_tree.heading("Address", text="Address", anchor=CENTER)
my_tree.heading("City", text="City", anchor=CENTER)
my_tree.heading("State", text="State", anchor=CENTER)
my_tree.heading("Zipcode", text="Zipcode", anchor=CENTER)
# Create Striped Row Tags
my_tree.tag_configure('oddrow', background="white")
my_tree.tag_configure('evenrow', background="lightblue")
# Add Record Entry Boxes
data_frame = LabelFrame(root, text="Record")
data_frame.pack(fill="x", expand="yes", padx=20)
fn_label = Label(data_frame, text="First Name")
fn_label.grid(row=0, column=0, padx=10, pady=10)
fn_entry = Entry(data_frame)
fn_entry.grid(row=0, column=1, padx=10, pady=10)
ln_label = Label(data_frame, text="Last Name")
ln_label.grid(row=0, column=2, padx=10, pady=10)
ln_entry = Entry(data_frame)
ln_entry.grid(row=0, column=3, padx=10, pady=10)
id_label = Label(data_frame, text="ID")
id_label.grid(row=0, column=4, padx=10, pady=10)
id_entry = Entry(data_frame)
id_entry.grid(row=0, column=5, padx=10, pady=10)
address_label = Label(data_frame, text="Address")
address_label.grid(row=1, column=0, padx=10, pady=10)
address_entry = Entry(data_frame)
address_entry.grid(row=1, column=1, padx=10, pady=10)
city_label = Label(data_frame, text="City")
city_label.grid(row=1, column=2, padx=10, pady=10)
city_entry = Entry(data_frame)
city_entry.grid(row=1, column=3, padx=10, pady=10)
state_label = Label(data_frame, text="State")
state_label.grid(row=1, column=4, padx=10, pady=10)
state_entry = Entry(data_frame)
state_entry.grid(row=1, column=5, padx=10, pady=10)
zipcode_label = Label(data_frame, text="Zipcode")
zipcode_label.grid(row=1, column=6, padx=10, pady=10)
zipcode_entry = Entry(data_frame)
zipcode_entry.grid(row=1, column=7, padx=10, pady=10)
# Move Row Up
def up():
rows = my_tree.selection()
for row in rows:
my_tree.move(row, my_tree.parent(row), my_tree.index(row)-1)
# Move Rown Down
def down():
rows = my_tree.selection()
for row in reversed(rows):
my_tree.move(row, my_tree.parent(row), my_tree.index(row)+1)
# Remove one record
def remove_one():
x = my_tree.selection()[0]
my_tree.delete(x)
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
# Delete From Database
c.execute("DELETE from customers WHERE oid=" + id_entry.get())
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Clear The Entry Boxes
clear_entries()
# Add a little message box for fun
messagebox.showinfo("Deleted!", "Your Record Has Been Deleted!")
# Remove Many records
def remove_many():
x = my_tree.selection()
for record in x:
my_tree.delete(record)
# Remove all records
def remove_all():
# Add a little message box for fun
response = messagebox.askyesno("WOAH!!!!", "This Will Delete EVERYTHING From The Table\nAre You Sure?!")
#Add logic for message box
if response == 1:
# Clear the Treeview
for record in my_tree.get_children():
my_tree.delete(record)
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
# Delete Everything From The Table
c.execute("DROP TABLE customers")
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Clear entry boxes if filled
clear_entries()
# Recreate The Table
create_table_again()
# Clear entry boxes
def clear_entries():
# Clear entry boxes
fn_entry.delete(0, END)
ln_entry.delete(0, END)
id_entry.delete(0, END)
address_entry.delete(0, END)
city_entry.delete(0, END)
state_entry.delete(0, END)
zipcode_entry.delete(0, END)
# Select Record
def select_record(e):
# Clear entry boxes
fn_entry.delete(0, END)
ln_entry.delete(0, END)
id_entry.delete(0, END)
address_entry.delete(0, END)
city_entry.delete(0, END)
state_entry.delete(0, END)
zipcode_entry.delete(0, END)
# Grab record Number
selected = my_tree.focus()
# Grab record values
values = my_tree.item(selected, 'values')
# outpus to entry boxes
fn_entry.insert(0, values[0])
ln_entry.insert(0, values[1])
id_entry.insert(0, values[2])
address_entry.insert(0, values[3])
city_entry.insert(0, values[4])
state_entry.insert(0, values[5])
zipcode_entry.insert(0, values[6])
# Update record
def update_record():
# Grab the record number
selected = my_tree.focus()
# Update record
my_tree.item(selected, text="", values=(fn_entry.get(), ln_entry.get(), id_entry.get(), address_entry.get(), city_entry.get(), state_entry.get(), zipcode_entry.get(),))
# Update the database
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
c.execute("""UPDATE customers SET
first_name = :first,
last_name = :last,
address = :address,
city = :city,
state = :state,
zipcode = :zipcode
WHERE oid = :oid""",
{
'first': fn_entry.get(),
'last': ln_entry.get(),
'address': address_entry.get(),
'city': city_entry.get(),
'state': state_entry.get(),
'zipcode': zipcode_entry.get(),
'oid': id_entry.get(),
})
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Clear entry boxes
fn_entry.delete(0, END)
ln_entry.delete(0, END)
id_entry.delete(0, END)
address_entry.delete(0, END)
city_entry.delete(0, END)
state_entry.delete(0, END)
zipcode_entry.delete(0, END)
# add new record to database
def add_record():
# Update the database
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
# Add New Record
c.execute("INSERT INTO customers VALUES (:first, :last, :id, :address, :city, :state, :zipcode)",
{
'first': fn_entry.get(),
'last': ln_entry.get(),
'id': id_entry.get(),
'address': address_entry.get(),
'city': city_entry.get(),
'state': state_entry.get(),
'zipcode': zipcode_entry.get(),
})
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Clear entry boxes
fn_entry.delete(0, END)
ln_entry.delete(0, END)
id_entry.delete(0, END)
address_entry.delete(0, END)
city_entry.delete(0, END)
state_entry.delete(0, END)
zipcode_entry.delete(0, END)
# Clear The Treeview Table
my_tree.delete(*my_tree.get_children())
# Run to pull data from database on start
query_database()
def create_table_again():
# Create a database or connect to one that exists
conn = sqlite3.connect('tree_crm.db')
# Create a cursor instance
c = conn.cursor()
# Create Table
c.execute("""CREATE TABLE if not exists customers (
first_name text,
last_name text,
id integer,
address text,
city text,
state text,
zipcode text)
""")
# Commit changes
conn.commit()
# Close our connection
conn.close()
# Add Buttons
button_frame = LabelFrame(root, text="Commands")
button_frame.pack(fill="x", expand="yes", padx=20)
update_button = Button(button_frame, text="Update Record", command=update_record)
update_button.grid(row=0, column=0, padx=10, pady=10)
add_button = Button(button_frame, text="Add Record", command=add_record)
add_button.grid(row=0, column=1, padx=10, pady=10)
remove_all_button = Button(button_frame, text="Remove All Records", command=remove_all)
remove_all_button.grid(row=0, column=2, padx=10, pady=10)
remove_one_button = Button(button_frame, text="Remove One Selected", command=remove_one)
remove_one_button.grid(row=0, column=3, padx=10, pady=10)
remove_many_button = Button(button_frame, text="Remove Many Selected", command=remove_many)
remove_many_button.grid(row=0, column=4, padx=10, pady=10)
move_up_button = Button(button_frame, text="Move Up", command=up)
move_up_button.grid(row=0, column=5, padx=10, pady=10)
move_down_button = Button(button_frame, text="Move Down", command=down)
move_down_button.grid(row=0, column=6, padx=10, pady=10)
select_record_button = Button(button_frame, text="Clear Entry Boxes", command=clear_entries)
select_record_button.grid(row=0, column=7, padx=10, pady=10)
# Bind the treeview
my_tree.bind("", select_record)
# Run to pull data from database on start
query_database()
root.mainloop()
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