我有这个元组:
topics = ('sport', 'math', 'science', 'literature')
This topics
tuple changes for every user (his length also changes)
How can I select from a sqlite3 table only the rows where their topic
column's value equals to one of the topics tuple's values?
我尝试使用此命令,但它不起作用:
conn = sqlite3.connect('questions_stack.db')
c = conn.cursor()
c.execute("""SELECT * FROM questions WHERE topic IN ?""", subject_tuple)
Can I select from the table like that if the topics
tuple's length changes every time and is not constant?
如果您能帮助我,我将不胜感激:) 提前致谢!
您需要计算列表中有多少个值,并生成相应的占位符。
就像是: