///<summary>Initialize a new key with a column and a value.</summary>
///<param name="col">The key's column.</param>
///<param name="val">The key's value</param>
public SinglePKey(IColumn col, IDbValue val) : base(col, val)
{
}
///<summary>Initialize a new basic primary key with a value.</summary>
///<param name="value">The value of the key.</param>
public SingleBasicPKey(IDbValue value) : base(value.Value, value.Type)
{
}
