您可以在使用模板化 SQL 查询时简化查询吗

Question

Is there a way to simplify this statement as well as access a certain element in the tuple.

l = (1,2,3,4)
sql = "INSERT INTO table1 VALUES ('%s', '%s', '%s', '%s') ON DUPLICATE KEY UPDATE id = 3"
cursor.execute(sql, l)

Into something that is more dynamic - I am using this as an example but I have a table with around 30 columns and it seems to be redundant doing it this way. I would also like to update some of the fields when there is a duplicate key. Is there a way to index to a particular value, such as the third one in the list and display it like this

l = (1,2,3,4)
sql = "INSERT INTO table1 VALUES ('%s') ON DUPLICATE KEY UPDATE id = {l[2]}"
cursor.execute(sql,l)

Where "l" will be something that contains the values that will be inserted into the table

Answer 1

You can construct the placeholder string dynamically based on the length of the tuple.

l = (1, 2, 3, 4)
placeholders = ",".join(['%s'] * len(l))
sql = f"INSERT INTO table1 VALUES ({placeholders}) ON DUPLICATE KEY UPDATE id = 3"
cursor.execute(sql, l)

BTW, don't name your variable list , that will replace the stanfard list() function.