The ‘L’ suffix concept in MySQL can be related with Python. In Python 2, the long integer literal is suffixed with L or l, but int and long have been binded into int in version 3. Therefore, there is no need for L or l.
Adding large numbers in Python Version 3.7 (Python 3), without using any suffix.

Here, if we suffix L or l, Python 3 gives an error.

However, Python Version 2 suffixed with L or l will not give an error.

The following is the output with no error.

Hence, Python int is equal to long type in C language, while Python 3 is just like BigInteger equivalent in java. We cannot assume it has great precision.
So, we can add suffix l or L to get a really large number in MySQL database row tuple when we do not know in advance how many values the user will enter.
Note − Adding suffix L or l in database is used to get a large number.