Question

我正在尝试将数据存储到数据库中。在我的脚本中，这对我有用，我有6个变量，包括时间戳：

mariadb_connection = mariadb.connect(user='user', password='pw', database='mydb')
cursor = mariadb_connection.cursor()
cursor.execute("CREATE TABLE IF NOT EXISTS mytable (ts TIMESTAMP, Day0 decimal (5,2), Day1 decimal (5,2), Day2 decimal (5,2), Day3 decimal (5,2), Day4 decimal (5,2), Day5 decimal (5,2))")
sql ="INSERT INTO mytable (ts, Day0, Day1, Day2, Day3, Day4, Day5)" 
sql += "VALUES (NULL, %s, %s, %s, %s, %s, %s)"
cursor.execute(sql,(day0, day1, day2, day3, day4, day5)) 
print("Storing values into SQL database")
mariadb_connection.commit()
mariadb_connection.close()

但是，如果我想存储单个值（float）（值= 7.4995244）以及时间戳，我会收到语法错误。为什么会这样？

mariadb_connection = mariadb.connect(user='user', password='pw', database='mydb')
cursor = mariadb_connection.cursor()
cursor.execute("CREATE TABLE IF NOT EXISTS mytable2 (ts TIMESTAMP, Day0 float(10,8))")
sql ="INSERT INTO mytable2 (ts, Day0)" 
sql += "VALUES (NULL, %s)"  
cursor.execute(sql,(day0)) #the error happens here
print("Storing values into SQL database")
mariadb_connection.commit()
mariadb_connection.close()

我得到的错误是：

mysql.connector.errors.ProgrammingError: 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '%s)' at line 1

Answer 1

好的，问题现在解决了。正如Adam Mitchell建议的那样，我需要做以下事情：

In the cursor.execute function, try changing syntax to this: cursor.execute(sql, (Day0, ))

将值存储到mySQL表时出错

1 个答案: