public string Declaration()
{
var declaration = !IsPrimaryKey && AllowNulls ? "NULL" : "NOT NULL";
if (DefaultExpression.IsNotEmpty())
{
declaration += " DEFAULT " + DefaultExpression;
}
return($"{declaration} {ColumnChecks.Select(x => x.FullDeclaration()).Join(" ")}".TrimEnd());
}
public virtual bool CanAdd()
{
return(AllowNulls || DefaultExpression.IsNotEmpty());
}