public ISqlOn OrNot(ISqlCondition clause) => Or(SqlCondition.Not(clause));
public ISqlOn OrNot(ISqlExpression clause, object param = null) => Or(SqlCondition.Not(clause, param));
public ISqlWhere OrNot(ISqlCondition clause) => Chain(() => SqlCondition.Not(clause));
public ISqlOn AndNot(ISqlCondition clause) => And(SqlCondition.Not(clause));
public ISqlWhere AndNot(ISqlCondition clause) => Chain(() => AndRaw = SqlCondition.Not(clause));