SQL 从数据库读取数据时出现语法错误

Question

运行这里显示的代码，我得到一个 SQL 语法错误，找不到原因：

startEpoch = 1623331800#july 10 7PM ePOCH
EndEpoch = 1624195800#july 20 7PM ePOCH

query = "SELECT `Machine`,`Epoch`,`Time`,`STATE` FROM MSC where `Epoch`>=" + str(startEpoch) + "and `Epoch`<=" + str(EndEpoch) + ";"
df = pd.read_sql(query, db)
df.head(3)

错误：

DatabaseError: Execution failed on SQL 'SELECT Machine,Epoch,Time,STATE FROM MSC where Epoch>=1623331800and Epoch<=1624195800;':

1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Epoch<=1624195800' at line 1

Answer 1

AND关键字与值1623331800and

连接

试试下面的方法：

startEpoch = 1623331800#july 10 7PM ePOCH
EndEpoch = 1624195800#july 20 7PM ePOCH

query = "SELECT `Machine`,`Epoch`,`Time`,`STATE` FROM MSC where `Epoch`>= " + str(startEpoch) + " and `Epoch`<= " + str(EndEpoch) + ";"
df = pd.read_sql(query, db)
df.head(3)

Answer 2

DatabaseError: Execution failed on SQL 'SELECT Machine,Epoch,Time,STATE FROM MSC where Epoch>=**1623331800and** Epoch<=1624195800;':

在纪元字段的条件后面，我认为如果在“和”字符前添加 1 space，错误就会解决。

SQL 从数据库读取数据时出现语法错误

SQL syntax error when reading data from database

python

mysql

syntax

syntax-error