public static string ToSqlExpression(this SqlWhereOperation operation, object value) => operation.ToSqlExpression(value, value);
public static string ToSqlExpression(this SqlWhereOperation operation, params object[] values) => operation.ToSqlExpression(values.Min(), values.Max());
public static string ToSqlExpression(this SqlWhereOperation operation) => operation.ToSqlExpression(null, null);