DBConnection connects to the database using database configuration and database type, i.e.

DBConnectionE connects to the database using database configuration and database type, i.e.

DBExecution executes specific SQL commands, i.e.

DBExecutionE executes specific SQL commands, i.e.

DBQuery queries from database, i.e.

DBQueryE queries from database, i.e.

DBQueryWithCustomValidation queries from database and validate whether the result meets the requirement.

DBQueryWithCustomValidationE queries from database and validate whether the result meets the requirement.

DBQueryWithValidation queries from database and validate whether the result is the same as expected text.

DBQueryWithValidationE queries from database and validate whether the result is the same as expected text.

DBConfig using server name, user name, password and database name.

DBUnknown is an error that occurs if the given database type is unknown or not supported.

ValidationFunctionFailed is an error that occurs if the validation function fails.