python mysql 使用内连接更新
python mysql update using inner join
此查询在 PyMysql
中不起作用,我似乎找不到问题所在。
query = """UPDATE user INNER JOIN identification_card ON user.id = %s SET user.id_type = %s, user.validity = %s"""
data = (identification_card.user_id, identification_card.card_type, identification_card.expiry_date)
cursor.execute(query,data)
为什么要传递列名而不是值
或者您简单地使用连接的列名称作为值
UPDATE user
INNER JOIN identification_card ON user.id = identification_card.user_id
SET user.id_type = identification_card.card_type
user.validity = identification_card.expiry_date
query = """UPDATE user
INNER JOIN identification_card ON user.id = identification_card.user_id
SET user.id_type = identification_card.card_type
user.validity = identification_card.expiry_date"""
cursor.execute(query,data)
此查询在 PyMysql
中不起作用,我似乎找不到问题所在。
query = """UPDATE user INNER JOIN identification_card ON user.id = %s SET user.id_type = %s, user.validity = %s"""
data = (identification_card.user_id, identification_card.card_type, identification_card.expiry_date)
cursor.execute(query,data)
为什么要传递列名而不是值
或者您简单地使用连接的列名称作为值
UPDATE user
INNER JOIN identification_card ON user.id = identification_card.user_id
SET user.id_type = identification_card.card_type
user.validity = identification_card.expiry_date
query = """UPDATE user
INNER JOIN identification_card ON user.id = identification_card.user_id
SET user.id_type = identification_card.card_type
user.validity = identification_card.expiry_date"""
cursor.execute(query,data)