格式化的sql查询在python中不起作用

Question

my code is:

engine = sqlalchemy.create_engine("credentials")
connection = engine.connect()

day = 180601
query = "select * from Data where Name like '%{0}%'".format(str(day))
df = pd.DataFrame(connection.execute(query).fetchall())

but this doesn't work. when i type:

query =  "select * from Data where Name like '%180601%'" 

then repeat the same process, this works fine although they produce same queries. i want to change the days in a for loop.

Any ideas would be appreciated. Thanks in advance!

Answer 1

I discovered there is no problem with the python itself. The problem is sql cannot get top 100 of the rows without order by clause. I think this is another bug but adding "order by col1" at the end of query solved the problem.

Thanks for your time.