loose coupling of classes over interface

Question

If i make change in IDatabase interface then it will affect, and at run while creating object of CustomerRepository we still worry about what i have to pass for constructor parameter, Does that mean still there is tight coupling for classes over interface ?

class CustomerRepository
{
    private readonly IDatabase database;

    public CustomerRepository(IDatabase database)
    {
        this.database = database;
    }

    public void Add(string CustomerName)
    {
        database.AddRow("Customer", CustomerName);
    }
}

interface IDatabase
{
    void AddRow(string Table, string Value);
}

class Database : IDatabase
{
    public void AddRow(string Table, string Value)
    {
    }
}