我一般是 SQLite 和 SQL 的新手,最近我一直在嘗試使用自動增量函式,我在代碼中做錯了,因為自動增量根本沒有填充列(只需回傳“沒有任何”)。
import sqlite3
make_table = "CREATE TABLE IF NOT EXISTS products (product_ID INTEGER PRIMARY KEY AUTOINCREMENT, name varchar(50), price int);"
c.execute(make_table)
insert_apple = "INSERT INTO products (name, price) VALUES ('apple', 2);"
c.execute(insert_apple)
insert_orange = "INSERT INTO products (name, price) VALUES ('orange', 2);"
c.execute(insert_orange)
insert_banana = "INSERT INTO products (name, price) VALUES ('banana', 3);"
c.execute(insert_banana)
select_products = "SELECT * FROM products;"
c.execute(select_products)
print(c.fetchall())
我已經查看了通常使用 AUTOINCREMENT 的方法,但是錯誤不斷重復,我找不到我的錯誤,也沒有找到任何具有相同問題的問題。我看到人們提到 ROWID,但沒有一個解釋足夠透徹并解釋了如何使用它。
任何幫助將非常感激。
編輯:我剛剛嘗試使用與此相同的技術制作一個假人并且它有效,所以它一定是上面代碼中的某個地方的錯字。
這是確實有效的假人的完整代碼:
import sqlite3
try:
connection = sqlite3.connect('SQLite_Python.db')
c = connection.cursor()
print("Database created and Successfully Connected to SQLite")
create_table = "CREATE TABLE IF NOT EXISTS users (id INTEGER PRIMARY KEY AUTOINCREMENT, name varchar(50), age INTEGER);"
insert_data1 = "INSERT INTO users (name, age) VALUES ('John', 25);"
insert_data2 = "INSERT INTO users (name, age) VALUES ('Jessica', 27);"
c.execute(create_table)
c.execute(insert_data2)
c.execute(insert_data1)
except sqlite3.Error as error:
print("Error while connecting to sqlite", error)
select_data = "SELECT * FROM users;"
c.execute(select_data)
print(c.fetchall())
所以我的猜測是這是一個錯字,如果事實證明是這樣,我將關閉這篇文章
uj5u.com熱心網友回復:
這對我有用:
import sqlite3
con = sqlite3.connect('test')
with con:
c = con.cursor()
make_table = "CREATE TABLE IF NOT EXISTS products (product_ID INTEGER PRIMARY KEY AUTOINCREMENT, name varchar(50), price int);"
c.execute(make_table)
insert_apple = "INSERT INTO products (name, price) VALUES ('apple', 2);"
c.execute(insert_apple)
insert_orange = "INSERT INTO products (name, price) VALUES ('orange', 2);"
c.execute(insert_orange)
insert_banana = "INSERT INTO products (name, price) VALUES ('banana', 3);"
c.execute(insert_banana)
select_products = "SELECT * FROM products;"
c.execute(select_products)
print(c.fetchall())
結果:
[(1, 'apple', 2), (2, 'orange', 2), (3, 'banana', 3)]
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