Sorted:

How to set a table field in MySQL to allow null values?

What is the usage of dynamic in C#?

How to connect QT to a MySQL database and insert data?

How does Redis ensure that cached data is always up to date?

What is the usage of ‘var’ in C#?

What are the functions of MyBatis first-level cache and second-level cache?

What is the method for setting up remote connections in SQL Server?

What is the purpose of number_format in PHP?

What is the purpose of the @StandardException annotation in Lombok?

What does ‘dynamic’ mean in C#?