In mysql, the not null constraint is used to restrict a column to not accept null values.the not null constraint allows a column to always contains a value which means you cant not insert/update a ...

Sql constraintsa constraint is a rule or limitation that we place on the data in a database that we can put into a column(s). a constraint is part of the table. we can apply constraints when we create ...

I've observed a strange behaviour, related to the MySQL limitation of modifying data type of column having not null constraint. The issue is that if using version 4.9.1 of liquibase-core, I'm getting ...